Scott,

It seems you have not read my previous post about this matter. If you want to creat a own style modifying an original one from any PSR keyboard, you need first to use the StyleEdit from Michael Bedesem from SVPworld site.
Download the StyleEdit from Michael P. Bedesem.
With this software you can easily only by clicking in a check box, take out the protection against to edit tracks others than 9 and 10 in a PSR 2000 style. After, you can edit all events of all tracks.
Also in the previous models like 740 or 730 it's the same way. I don't know about 9000 but I guess it's the same.

Regards
Carlos Rodrigues