[jbpm-dev] [JBPM 5.4 eclipse plugin] Getting the BPMN2 element from a JBPM edit part.

Hello, Not sure I should be posting this here, but my try on the forums was not very successful. Anyway, I'm trying to add a popup menu on a right click on JBPM diagram nodes. I need to find the element from the bpmn2 model associated to this edit part. I have to precise I do edit bpmn2 models, from the org.eclipse.bpmn2 feature (which contains the associated ecore metamodel). Now, from what I gather, the bpmn models originally used by jbpm was pure xml, and some mechanisms (wrappers?) have been used to allow the coexistence of both models. However, I really need to access the bpmn2 model element from the edit part. Is that possible ? I'm inclined to change the source of the org.drools.eclipse and org.jbpm.eclipse plugins to export the required packages if needed, and build my own feature after these changes, but I'd really like to know how the wrapping mechanisms work and how they can be reverted. Any pointers would be welcome. Thank you, and have a nice day :) PS : would it be easier for me to do this using the 6.0 beta version ?