Ok, after resolving some problems with the RRUpd8 plugin I got it to work. It's really a usefull tool so it goes into the skin. So far the main screen is finished and looks like this:
The only downside is that I've been wasting my time for 2 days on making screens for a file copier that now becomes obsolete. Enforcers RRUpd8 can do the same even better and more. So the file copier probably won't make it into the final skin but here's a screenshot of it so it wasn't a complete waste of time...
RRUpd8 Path screen is also finished: