Umm... Someone in the know (Toby probably) will correct me if I'm wrong, but it seems to me that something like this would require re-writing the Flancedoor interpreter which is built into the Empeg visualization libraries (which are closed source). Unless we've got someone out there who can disassemble Toby's code and know enough to implement the code which actually processes the dance moves, I can't see how this could be done.

Edit: Nevermind, I just realized you are probably talking about this as a feature request rather than a 3rd party project. I guess I thought we were still in the programming forum.