Hi
If you have the latest operating system (Available from  
www.generalmusic.com)   GEM made the sounds available via the Help button - when in performance mode.
This lists all the sound in familys i.e. pianos, organs etc.
When you have stored your favourite Performance sounds you can simply access them by pressing the R/H cursor arrow, Select User Bank.
To quickly access the performances when you are playing live - you can type the Perf' number 1,2,3 etc via the numerical keypad. Rather than using the dial 
Regards 
HARP