The way I do it, is each Registration button #1 calls up the song I want to play. It also calls up either Grand piano or an electric piano. The rest of the registration buttons are voices. I normally have #2 as harmonica, #3 for a sax, #4 organ, #5 flute or horn, #6 vibraphone, #7 guitar, and #8 brass or accordian.

This way, I get 8 extra ots's. I never have to fear pressing a registration button will call up the wrong song.

Beakybird