You have done it before, so probably kicking in open doors
- but here I go
Midi Program Enable must be ON also, and midi CC, not nrpn(I think)
For current bank selected you need only send C0 01 for program 2 on midi channel 1, two bytes
To make bank select if needing change, unless you organized all you need in one bank
- send B0 20 01 for bank 2, midi channel 1, three bytes
Since not done it myself, not sure if display changes preset, or if just edit buffer is filled with the chosen program. I read a remark on this for some synth, but not sure if REV2.
Must be possible on controller you have...