FR: Mode Selection via midi?

[herr prof]

Would it be possible to add Aboy mode selection via program change or
a midi cc? That way an external sequencer can change it from midi
master to slave, or keyboard mode or whatever automatically.

Here is my application

I have two sequencers merged so its either LSDJ or the other sequencer
as a midiout master. Id like to be able to have master sequencer a
tell arduinoboy to change from midi in mode to midi out at the end of
a song, so lsdj can become the master on another song, or so it can
going into keyboard mode so I can play it with a keyboard or whatever.

Peter