BTW, if anyone is curious about how I'm going about getting my BiaB songs recorded in a more finished way, I do the following:

First, I simply export the BiaB song/arrangement as MIDI, containing only drums, bass, and piano comping.

I then import this MIDI into my DAW and route the channels to soft-synth rack (Reason in this case) of instruments that I have put together for "jazz".

The idea is that the BiaB MIDI serves as a placeholder framework around which I hang all my custom sequencing, real recorded instrumentation, and vocals for the song.

I expect most or all of the original BiaB generated midi will "go away" as I finish up my tracks.