Patches and discussion for Ensoniq VFX family

My basic performance rig is the SD-1, and a Roland VK-8M Hammond clone controlled by a 45 key midi-controller keyboard. What I would like to do is use the keyboard of the SD-1 to control the VK-8M only, and control everything on the SD-1 with a larger external controller (76 or 88 key) since i use the pianos primarily. This seems to work if i set an individual piano program to midi-in. Is there anyway to set this globally so all the programs on the SD-1 play from the external keyboard, and the SD-1's keyboard plays none (except for the VK-8M)? I have poked around the Musicians Manual but Im rather dyslexic when it comes to midi.

Rich