Don't know which sending MIDI device you are using and what its capabilities are.
Normally, the MIDI controller can send program changes. MIDI program changes # 1-50 load Player Slots 1-50. If not already preassigned you assign these numbers in the MIDI controller's presets and then somehow step through its presets. Controllers with fewer buttons should have preset up/down functions. So you hit the same button and it loads preset 1, then preset 2, then preset 3 and these are sending program change #1, #2, #3. And the Player loads accordingly.
So I don't really understand the need for a Rig Up/Down CC#s.
That we have Bank/Performance Up/Down CC#s has special historic reasons.
At analog switches it's a different story, since these have no brain.
