Hey gogojjtech, I have been music hacking for a while now (using your tut!!) and I have stumbled across a trick or something possibly useful.
I have only used one voicegroup for all my tracks... to do this I have just edited all 0-125 or so tracks with my offsets with imported wav. files and such.
This allows me to import any midi and use the 'completed' voice group.
I have filled in about 40 or so most common ones, but I want your input on if you think a patch containing all midi sounds that allow people to just use one voicegroup and have 0 squares?
It's just an idea, I still don't know if it will work but it's making my music hacking easier.