I just received the midi sustain unit: http://tomscarff.tripod.com/. It works as desired. I programmed my PSR2000 to receive a midi message from channel one to be applied to the entire keyboard. This makes it work just like the regular sustain pedal on the PSR2000. Now I programmed the pedal I was using for sustain to "fill to self". This adds a fill in what ever style control setting I'm at (A, B, C, or D). I am using the other footpedal to activate and deactivate echo/harmony. Anyway, it works just fine.

If you want to add an extra pedal to your PSR, this might be the ticket.

Beakybird