Glenn
I'm just a beginner in this area myself, so I'm clearly not the one to answer your question. My initial investigation into SysEx, though, led me to understand that SysEx commands vary greatly by manufacturer (hence the term, System Exclusive). I have a Yamaha kb, so I began with an article entitled "Changing effects on Yamaha keyboards using System Exclusive," found at:
http://thomer.com/misc/sysx.html . It led me to the site I earlier referenced.
I'm sorry I can't answer more helpfully. I'm sure, though, that someone else will.
Good luck,
Charles
[This message has been edited by cwalkeralso (edited 01-03-2006).]