Roland G1000/G800/RA800 (and I believe VA series as well) can indeed perform performance and program changes initiated by MIDI - it is in the manual, though not trivial (each program is uniquely referenced by a combination of several change messages). I was thinking of using some of the programmable MIDI pedals to do that, but it seemed to me that this would require more programming than those MIDI pedals can accomodate in their memory. However, you should be able to do it via MIDI from a computer, or a controller keyboard.

If you are successful, please share with us how you do it.

BTW, There is a dedicated, non-midi foot controller FC7 which lets you select parts of the accompaniment (Basic/Advanced, Orig/Variation, Fill, Intro, Ending), much like Solton's footswitch does.

Regards,