Hi Foks,
you can now optionally install components like bam-console or a specific db support
http://jbpm.dyndns.org/jbpmwiki/index.php?title=JBPM3BuildingTheInstaller
Next is to integrate the installer in the Hudson QA. The installer should be the only supported way to install jBPM in a target container. Like every other supported functionality, this needs to be automatically verified.