Ok Group, Here is what I have so far! I can access these from the Roland Accordion.

GM2
Access MIDI sounds
CC00 = 0 CC32 = 0 PC = 1-128
CC00 = 1 CC32 = 0
CC00 = 10 CC32 = 0
CC00 = 11 CC32 = 0

PRESET SOUNDS
CC00 = 0FF CC32 = 30 PC = 1-128
CC00 = OFF CC32 = 31 PC = 1-128
CC00 = OFF CC32 = 32 PC = 1-128

PROGRAM
CC00 = 0FF CC32 = 20 PC = 1-128
CC00 = OFF CC32 = 21 PC = 1-128
CC00 = OFF CC32 = 22 PC = 1-128

Maybe we can figure out how to access the style banks, also, Registrations via remote
Don P