Here are the manual steps to install jBPM6 Modeler and run a sample example in Eclipse.
1.) Download Eclipse Juno:
http://download.eclipse.org/technology/epp/downloads/release/juno/SR2/eclipse-java-juno-SR2-win32-x86_64.zip
Unzip this into a directory, say jbpm6
2.) Download Drools and jBPM6 plugin, i.e.,:
http://download.jboss.org/drools/release/6.0.0.Final/droolsjbpm-tools-distribution-6.0.0.Final.zip
Unzip this plugin to a temp directory, say TEMP\droolsjbpm-tools-distribution-6.0.0.Final. Copy 'features' and 'plugins' directories from TEMP\droolsjbpm-tools-distribution-6.0.0.Final into
JBPM6\eclipse
3.) Install the BPMN 2 plug-in (http://projects.eclipse.org/projects/soa.bpmn2-modeler) using the update link http://download.eclipse.org/bpmn2-modeler/updates/juno/0.2.7/
It is required to have a runtime dependant libraries that a jBPM6 sample can use.
4.) Download the libraries (jbpm-6.0.0.Final-bin.zip ) from
http://sourceforge.net/projects/jbpm/files/jBPM%206/jbpm-6.0.0.Final/jbpm-6.0.0.Final-bin.zip/download
and unzip into a directory, say JBPM6\runtime.
Set 'Installed jBPM Runtimes' to the runtime directory as shown below (Window->Preferences->Installed jBPM Runtimes)
5.) Craete a sample jBPM Project using File->New->Project->jBPM->jBPM Project