I posted more info back a few posts, see below.
The ST2 XT2 file for the RealTracks are in the Soloist folder.
The regions are just the chord sheet imported from the Biab SGU.

Originally Posted By: musocity
Quote:
Peter, it would be kind of you, if you could tell us the BiaB users, how to open and read a .bt0 and .bt1 file. Why? Because these files are RealTrack chord mapping files. If we can read it, we will know which chord is recorded to which bar of the .wma source file in the RealTracks folder, then we can directly open, chop, and comp the wma source files according to chord, works much faster than partial regen twenty times for one bar.

I thought they were just beat files and all the info is in ST2 XT2.
If you want all that info just use the track injector.

I might have an easier way to do it all soon rather that having to use the Track Injector.
If you use wav files you can also write the info in as cue points that you can see if your DAW will display them like Reaper.
All the sections below you can edit to tweak or get the solo you want and be able to change the track to DI <> FX:



This is wav file cue points written into the wav to show chord changes: