Bill,
If you follow Cee's instructions from his web site, everything works just fine. The problem is that you probably won't like what you hear. After being spoiled by the wonderful voices of the KN7000, the MIDI GM equivalents are very poor and the DSL enhancements, ETC, are not there.
If you must do this, try to record using all voices(including the acc. voices) that are similar to the GM voices. It takes a lot of fiddling but you can change the voices in the KN7000 before recording or afterwards using MIDI editing software. The KN7000 is probably the easiest because you have a pretty good idea of what the final result will sound like.
Lot's of luck,
Walt