I've been putting my MIDI on one track, my drum VSTi on the next, and then the audio outs from the VSTi on subsequent (destination) tracks. I freeze the destination tracks only and mute the VSTi track if it gets distracting or bypass the plug if I want to free up CPU or RAM. Destination tracks get wavs written to them and the VSTi track's sends are deleted with the freeze (returned if un-frozen). If you freeze the VSTi track you get a 32-channel wav file if you're not careful. Not tried freezing the whole lot yet..? Edit: Does that make sense?? >