Okay, I already changed something myself:

Including a process in the scenario is changed from

<sim-process name='test'>

to

<sim-process path='Test/processdefinition.xml'>

This makes it easy to load the process from the XML directly while constructing the scenario. Otherwise the process definition has to be available somewhere, which gets a problem. The one from the jbpmCointext can not be used, because it is not instrumented for simulation.

I have some ideas to improve that later, but for the moment it is the most easy, but also convenient way I think.