by default jbpm-console fetches assets from guvnor but that is not the only way that can be used. From version 5.4 there are possibilities to define custom managers for building KnowledgeBase and KnowledgeSession. Take a look at documentation that can be found here. By implementing custom KnowledgeBaseManager class you can build the KnowledgeBase in whatever you like way, meaning get assets from any place you like. Then you need to enable it when starting JBoss and that should be all.
HTH