I posted information about this upgrade several months ago (I think around November of 2001).
the major inhancements are 4 voice layer capabilities with the on and off buttons on the main screen now, music assistant with 750 preset music song styles supplied on the zip and you can add your own, variphrase sounds now available on the left hand voices where before they were only on the right,and numerous other features which my brain can't remember right now while I'm at home.
George Kaye
Kaye's Music Scene