Ronan, This release of jBPM 4 was not targeted at being customized this way. It does not mean it is not possible, it is just (on purpose) not documented yet. There are more things in the dev guide that needs some more depth or that are in there because they are in 'incubation' If you have contributions in that area (documentation), you are more than welcome to attach them as patches to jira issues and I'll be happy to add View the original post : http://www.jboss.org/index.html?module=bb&op=viewtopic&p=4245323#... Reply to the post : http://www.jboss.org/index.html?module=bb&op=posting&mode=reply&a...