The BeatBuddy will not be able to do this but it can already (as of 4.1.4) send out the same MSB LSB and PC (or only MSB and PC in Aeros Mode) that would open that same BeatBuddy song, so it is based on position.
This is not ideal since there may not be patches on your keyboard that matches what BB sends
You could switch MIDI signals using a special MIDI device to change one message into another. We realize how much further this could go, as we made the Aeros able to do this already when you open a song, it can send any combination of MSB, LSB, and PC.
We may be able to make BB support doing this once BBM2 is ready, BBM1 cannot support this