Frank, I just purchased M-Audio's Key Rig..It has 4 modules..Stage piano,Synth, Organ and GM..
Last week I played the M-Audio stage piano[hardware], and was not impressed..
This software is better than the hardware unit..
It is 312megs in size..I just installed it to use the GM module and I am surprised how good it sounds..It is designed to run 4 modules at a time..this allows you to replace the GM piano with the Stage module sound, the GM organ with the Organ module[with lelie], and any synth sound from the GM with the Synth module..
Street price is $99..
http://www.m-audio.com/products/en_us/KeyRig-main.html

[This message has been edited by Fran Carango (edited 10-08-2005).]