The PSR2000 has some Session styles. I guess these are styles that have extra realism. The CVP209 styles that I posted at the egroups site have numerous Session styles in various music genres. If you explore these styles by inserting a floppy with these styles on your PSR2000, you will see the word Session written above the style.

It sounds like StyleEdit facilitates editing a style on your keyboard. CasmEdit is to edit a style on your computer sequencer. CasmEdit also has some utilities to do part changes and whatnot.

Larry