Hi, I have looked at the info and modified the jsp accordingly, the full detail follows. What I have found is that the ExtendedDataTable selection works fine in the main panel but in all of the modal panels included it only gets set when I add an a:commandButton to the modal panel. It seems to get set when the modal panel closes.
 
<%@ page contentType="text/html" %>
 
<%@ taglib uri="http://java.sun.com/jsf/html"                    prefix="h" %>
<%@ taglib uri="http://java.sun.com/jsf/core"                    prefix="f" %>
<%@ taglib uri="https://ajax4jsf.dev.java.net/ajax"                 prefix="a" %>
<%@ taglib uri="http://richfaces.org/rich"                         prefix="r" %>
 
<f:view>
    <html>
        <head>
            <title>Customer Search</title>
            <link rel="stylesheet" type="text/css" href="<%= request.getContextPath() %>/styles/styles.css" /> 
        </head>
        <body>
        
        <jsp:include page="pleaseWait.jsp"/>
        
        <%-- COUNTRY SEARCH --%>
         <h:form>
             <r:modalPanel id="countrySearch" >
                 <f:facet name="header">
                         <h:outputText value="Country Search"/>
                 </f:facet>
              
                    <r:extendedDataTable id="countryTable"
                                             height="200px"
                                             width="100%"
                                               value="#{customerBean.countryDataModel}"
                                               var="country"
                                               selectionMode="single" 
                                               selection="#{customerBean.countrySearchSelection}">
         
                                          <r:column sortBy="#{country.isoCode}"  sortable="true" >
                                              <f:facet name="header">
                                                  <h:outputText value="ISO Code" />
                                              </f:facet>
                                              <h:outputText value="#{country.isoCode}" />
                                          </r:column>
                                          
                                          <r:column sortBy="#{country.name}"  sortable="true" >
                                              <f:facet name="header">
                                                  <h:outputText value="Country Name" />
                                              </f:facet>
                                              <h:outputText value="#{country.name}" />
                                          </r:column>
                        </r:extendedDataTable>
 
                 <r:spacer height="10px"/>
                <r:toolBar>
                    <r:toolBarGroup location="left">
                        <a:commandButton value="Select" action="#{customerBean.identifySelectedCountry}" 
                                                       reRender="customerDetailPanel" 
                                                       onclick="Richfaces.hideModalPanel('countrySearch')"/>
                    </r:toolBarGroup>
                    <r:toolBarGroup location="right">
                        <a:commandButton value="Cancel"  onclick="Richfaces.hideModalPanel('countrySearch')" />
                    </r:toolBarGroup>
                </r:toolBar>
             </r:modalPanel>
         </h:form>
 
        
        <%-- RM SEARCH --%>
         <h:form>
             <r:modalPanel id="rmSearch" >
                 <f:facet name="header">
                         <h:outputText value="Relationship Manager Search"/>
                 </f:facet>
              
                    <r:extendedDataTable id="rmTable"
                                             height="200px"
                                             width="100%"
                                               value="#{customerBean.rmDataModel}"
                                               var="rm"
                                               selectionMode="single" 
                                               selection="#{customerBean.rmSearchSelection}">
         
                                          <r:column sortBy="#{rm.firstName}"  sortable="true" >
                                              <f:facet name="header">
                                                  <h:outputText value="First Name" />
                                              </f:facet>
                                              <h:outputText value="#{rm.firstName}" />
                                          </r:column>
                                          
                                          <r:column sortBy="#{rm.surName}"  sortable="true" >
                                              <f:facet name="header">
                                                  <h:outputText value="SurName" />
                                              </f:facet>
                                              <h:outputText value="#{rm.surName}" />
                                          </r:column>
                                          
                                          <r:column sortBy="#{rm.costCenter}"  sortable="true" >
                                              <f:facet name="header">
                                                  <h:outputText value="Cost Center" />
                                              </f:facet>
                                              <h:outputText value="#{rm.costCenter}" />
                                          </r:column>
                        </r:extendedDataTable>
 
                 <r:spacer height="10px"/>
                <r:toolBar>
                    <r:toolBarGroup location="left">
                        <a:commandButton value="Select" action="#{customerBean.identifySelectedRM}" 
                                                       reRender="customerDetailPanel" 
                                                       onclick="Richfaces.hideModalPanel('rmSearch')"/>
                    </r:toolBarGroup>
                    <r:toolBarGroup location="right">
                        <a:commandButton value="Cancel"  onclick="Richfaces.hideModalPanel('rmSearch')" />
                    </r:toolBarGroup>
                </r:toolBar>
             </r:modalPanel>
         </h:form>
 
        
        <%-- PARENT SEARCH --%>
         <h:form>
             <r:modalPanel id="parentSearch" >
                 <f:facet name="header">
                         <h:outputText value="Customer Parent Search"/>
                 </f:facet>
              
                    <r:extendedDataTable id="parentTable"
                                             height="200px"
                                             width="100%"
                                               value="#{customerBean.parentDataModel}"
                                               var="parent"
                                               selectionMode="single" 
                                               selection="#{customerBean.parentSearchSelection}">
 
                                          <r:column sortBy="#{parent.internalRef}"  sortable="true" >
                                              <f:facet name="header">
                                                  <h:outputText value="Internal Reference" />
                                              </f:facet>
                                              <h:outputText value="#{parent.internalRef}" />
                                          </r:column>
                                                   
                                          <r:column sortBy="#{parent.shortName}"  sortable="true" >
                                              <f:facet name="header">
                                                  <h:outputText value="Short Name" />
                                              </f:facet>
                                              <h:outputText value="#{parent.shortName}" />
                                          </r:column>
                                          
                                          <r:column sortBy="#{parent.longName}"  sortable="true" >
                                              <f:facet name="header">
                                                  <h:outputText value="Long Name" />
                                              </f:facet>
                                              <h:outputText value="#{parent.longName}" />
                                          </r:column>
 
                                          
                        </r:extendedDataTable>
 
                 <r:spacer height="10px"/>
                <r:toolBar>
                    <r:toolBarGroup location="left">
                        <a:commandButton value="Select" action="#{customerBean.identifySelectedParent}" 
                                                       reRender="customerDetailPanel" 
                                                       onclick="Richfaces.hideModalPanel('parentSearch')"/>
                    </r:toolBarGroup>
                    <r:toolBarGroup location="right">
                        <a:commandButton value="Cancel"  onclick="Richfaces.hideModalPanel('parentSearch')" />
                    </r:toolBarGroup>
                </r:toolBar>
             </r:modalPanel>
         </h:form>
 
         
         <%-- MAIN SCREEN --%>
         <h:form>
           
                   <jsp:include page="header.jsp" />
                   <jsp:include page="menuBar.jsp" />
                   
                   <r:spacer height="20px"/>
                <r:messages  layout="list" showDetail="false" showSummary="true" styleClass="error-text" >
                    <f:facet name="errorMarker" >
                        <h:graphicImage url="/images/sad.jpg"/>
                    </f:facet>
                    <f:facet name="infoMarker" >
                        <h:graphicImage url="/images/happy.jpg"/>
                    </f:facet>
                    
                </r:messages>
                <r:spacer height="20px"/>
 
                <r:simpleTogglePanel>
                
                    <f:facet name="header" >
                        <h:outputText value="Customer Search"   />
                    </f:facet>
                    
                    <a:outputPanel id="customerSearchPanel" >
                    
                        <h:panelGrid columns="2" >
                                <h:outputLabel value="Search Type: " for="searchType" styleClass="default-label"/>
 
                                <h:selectOneRadio id="searchType" value="#{customerBean.searchType}" styleClass="default-input" >
                                    <f:selectItems value="#{customerBean.searchTypes}"/>
                                </h:selectOneRadio>    
 
                                <h:outputLabel value="Search Criteria: " for="searchCriteria" styleClass="default-label"/>
                                <h:inputText id="searchCriteria" value="#{customerBean.searchCriteria}" styleClass="default-input" size="64"/>
 
                        </h:panelGrid>
                        
                        <r:spacer height="10px"/>
                        
                        
                        <r:toolBar>
                            <r:toolBarGroup>
                                <a:commandButton value="Search"  reRender="customerSearchResultsPanel" action="#{customerBean.customerSearch}" />
                            </r:toolBarGroup>
                        </r:toolBar>
                        
                    </a:outputPanel>
                </r:simpleTogglePanel>
 
                <r:spacer height="10px"/>
 
                <r:simpleTogglePanel>
                
                    <f:facet name="header" >
                        <h:outputText value="Customer Search Results"  />
                    </f:facet>
                    
                    <a:outputPanel id="customerSearchResultsPanel" >
                    
                        <r:extendedDataTable id="customerTable"
                                     height="200px"
                                       value="#{customerBean.customerDataModel}"
                                       var="customer"
                                       selectionMode="single" 
                                       selection="#{customerBean.customerSearchSelection}">
                                  <r:column sortBy="#{customer.internalRef}"  sortable="true" width="20%">
                                      <f:facet name="header">
                                          <h:outputText value="Internal Reference" />
                                      </f:facet>
                                      <h:outputText value="#{customer.internalRef}" />
                                  </r:column>
                                  <r:column sortBy="#{customer.shortName}"  sortable="true" width="40%" >
                                      <f:facet name="header">
                                          <h:outputText value="Customer Name" />
                                      </f:facet>
                                      <h:outputText value="#{customer.shortName}" />
                                  </r:column>
                                  <r:column sortBy="#{customer.controllingTeamDescription}" sortable="true" width="40%" >
                                      <f:facet name="header">
                                          <h:outputText value="Controlling Team" />
                                      </f:facet>
                                      <h:outputText value="#{customer.controllingTeamDescription}" />
                                  </r:column>
 
                                  <a:support event="onselectionchange"
                                             reRender="customerDetailPanel" 
                                             action="#{customerBean.identifySelectedCustomer}" />
                          </r:extendedDataTable>
 
                          <r:spacer height="10px" />                      
 
                        
                    </a:outputPanel>
                </r:simpleTogglePanel>
                
                <r:spacer height="10px"/>
                
                <r:simpleTogglePanel>
                    <f:facet name="header" >
                        <h:outputText value="Customer Detail"  />
                    </f:facet>
                    <a:outputPanel id="customerDetailPanel" >
                    
                        <h:panelGrid columns="3" >
 
                                <h:outputLabel value="Internal Reference: " for="internalRef" styleClass="default-label"/>
                                <h:inputText id="internalRef" value="#{customerBean.internalRef}" styleClass="default-input" size="64"/>
                                <h:inputHidden />
                                                        
                                <h:outputLabel value="Short Name: " for="shortName" styleClass="default-label"/>
                                <h:inputText id="shortName" value="#{customerBean.shortName}" styleClass="default-input" size="64"/>
                                <h:inputHidden />
 
                                
                                <h:outputLabel value="Long Name: " for="longName" styleClass="default-label"/>
                                <h:inputText id="longName" value="#{customerBean.longName}" styleClass="default-input" size="128"/>
                                <h:inputHidden />
 
                                
                                <h:outputLabel value="Controlling Team: " for="controllingTeam" styleClass="default-label"/>
                                <h:selectOneMenu id="controllingTeam" value="#{customerBean.controllingTeamCode}" styleClass="default-input" >
                                    <f:selectItems value="#{customerBean.controllingTeams}" />
                                </h:selectOneMenu>
                                <h:inputHidden />
 
                                
                                <h:outputLabel value="Company Registration: " for="companyReg" styleClass="default-label"/>
                                <h:inputText id="companyReg" value="#{customerBean.companyReg}" styleClass="default-input" size="32"/>
                                <h:inputHidden />
 
                                <h:outputLabel value="Credit Rating: " for="creditRating" styleClass="default-label"/>
                                <h:inputText id="creditRating" value="#{customerBean.creditRating}" styleClass="default-input" size="32"/>
                                <h:inputHidden />
                                
                                <h:outputLabel value="Rating Source: " for="ratingSource" styleClass="default-label"/>
                                <h:selectOneMenu id="ratingSource" value="#{customerBean.ratingSource}" styleClass="default-input" >
                                    <f:selectItems value="#{customerBean.ratingSources}" />
                                </h:selectOneMenu>
                                <h:inputHidden />
                                
                                <h:outputLabel value="Review Date: " for="reviewDate" styleClass="default-label"/>
                                <r:calendar id="reviewDate" value="#{customerBean.reviewDate}" styleClass="default-input"  defaultTime="true"/>
                                <h:inputHidden />
                                                                
                                <h:outputLabel value="Relationship Manager: " for="rm" styleClass="default-label"/>
                                <h:inputText id="rm" value="#{customerBean.relationshipManagerFullName}" styleClass="default-input" size="128"/>
                                <a:commandButton value="Search"    onclick="Richfaces.showModalPanel('rmSearch', {height:'300px', width:'300px'});" reRender="customerDetailPanel" />
 
                                
                                <h:outputLabel value="Customer Parent: " for="parent" styleClass="default-label"/>
                                <h:inputText id="parent" value="#{customerBean.parentShortname}" styleClass="default-input" size="128"/>
                                <a:commandButton value="Search"    onclick="Richfaces.showModalPanel('parentSearch', {height:'300px', width:'300px'});" reRender="customerDetailPanel" />
 
                                
                                <h:outputLabel value="Country of Incorporation: " for="incorp" styleClass="default-label"/>
                                <h:inputText id="incorp" value="#{customerBean.countryOfIncorporationDescription}" styleClass="default-input" size="128"/>
                                <a:commandButton value="Search"    onclick="Richfaces.showModalPanel('countrySearch', {height:'300px', width:'300px'});" reRender="customerDetailPanel"  >
                                    <a:actionparam name="option" value="INCORP" assignTo="#{customerBean.countryOption}" />
                                </a:commandButton>
 
                                
                                <h:outputLabel value="Country of Operation: " for="operate" styleClass="default-label"/>
                                <h:inputText id="operate" value="#{customerBean.countryOfOperationDescription}" styleClass="default-input" size="128"/>
                                <a:commandButton value="Search"   onclick="Richfaces.showModalPanel('countrySearch', {height:'300px', width:'300px'});" 
                                                                  reRender="customerDetailPanel">
                                    <a:actionparam name="option" value="OPERATE" assignTo="#{customerBean.countryOption}" />
                                </a:commandButton>
 
                                                                                        
                        </h:panelGrid>
                    
                        <r:spacer height="10px"/>
                        
                        <r:toolBar>
                                <r:toolBarGroup>
                                    <a:commandButton value="Reset Customer Detail"  reRender="customerDetailPanel"  action="#{customerBean.resetCustomerDetail}" />
                                    <a:commandButton value="Add / Save Customer Detail"  action="#{customerBean.updateCustomerDetail}" />
                                </r:toolBarGroup>
                        </r:toolBar>                    </a:outputPanel>
                </r:simpleTogglePanel>    
 
    
            </h:form>
 
        </body>
    </html>
</f:view>