JBossDeveloper

myfaces api module.xml

<module xmlns="urn:jboss:module:1.0" name="org.apache.myfaces-api">
    <dependencies>
        <module name="javax.el.api" export="true"/>
        <module name="javax.servlet.api" export="true"/>
        <module name="javax.servlet.jsp.api" export="true"/>
        <module name="javax.servlet.jstl.api" export="true"/>
        <module name="javax.validation.api" export="true"/>
    </dependencies>

    <resources>
        <resource-root path="myfaces-api-2.1.4.jar"/>
        <!-- Insert resources here -->
    </resources>
</module>

and myfaces-impl moudle.xml

<module xmlns="urn:jboss:module:1.0" name="org.apache.myfaces-impl">
    <dependencies>
        <module name="org.apache.myfaces-api"/>
        <module name="javaee.api"/>
        <module name="javax.servlet.jstl.api"/>
        <module name="org.apache.xerces" services="import"/>
        <module name="org.apache.xalan" services="import"/>
    </dependencies>

    <resources>
        <resource-root path="myfaces-impl-2.1.4.jar"/>
          <resource-root path="commons-beanutils-1.8.3.jar"/>
          <resource-root path="commons-codec-1.3.jar"/>
          <resource-root path="commons-collections-3.2.jar"/>
          <resource-root path="commons-digester-1.8.jar"/>
          <resource-root path="commons-logging-1.1.1.jar"/>
        <!-- Insert resources here -->
    </resources>
</module>

and the jboss-deployment-structure.xml

<jboss-deployment-structure>
     <deployment>
          <dependencies>
               <module name="org.jboss.logmanager" />
               <!-- <module name="org.dom4j" /> -->
               <module name="org.apache.myfaces-api"/>
               <module name="org.apache.myfaces-impl"/>
          </dependencies>
          <exclusions>
               <module name="javax.faces.api" slot="main" />
               <module name="com.sun.jsf-impl" slot="main" />
          </exclusions>
     </deployment>
</jboss-deployment-structure>

That's a really good reference for people, thanks Hantsy!