Miki,
Do you mean "progran change" numbers? If so, why not just make a "map" (paper list)of all the go-to sound groups, like Piano(001-009) Strings(049-056).... like that. Then you can see which button coresponds to each group from the Yamaha front panel. Ther HAS to be a way to use the 9000 as a controller without TOO much trouble.