It would be nice if you could in the middle of a song change what program the vsti play.

Read that the new buzz vsti loader could do that…

you can already do this with a special MidiCommand :
… 01 … 92 0002 (note / instr / vol / pan / effectvalues) will set instrument 01’s program to 02. Same goes for MIDI Instruments.

btw : 0x90 (in pancolumn with the same syntax) will send COntrollerChanges, 0x91 pitchbend

Hmm, now you guys are implementing features so fast that its before I even know I want them ;) Should have rtfm :P

But that is very nice!!