thanks seeker...I read that but it seems to be more about rendering an existing track to audio. what I'm puzzled about is how to create the MIDI track in the first place!

I'll try and explain further but I have to apologize in advance because 1) I know nothing about MIDI and 2) I can only use BIAB as a reference as I have not yet used RealBand.

So, here is something I can do now with BIAB,

1) start a new song
2) mute all tracks except one
3) on the unmuted track select MIDI SuperTrack and select 2060:Strings
4) enter my chords
5) press GenPlay and BIAB generates a nice string accompaniment that follows my chords

Is there any way to do something similar using GPO4 instead of the MIDI SuperTrack?