The BiaB Track Injector is just waiting for PG to get BiaB to write a txt file BBoutput.txt to bb\Data instead of having to hack into menus to get the data txt (this txt will also allow the BBPlugin to import the same track sections in the BiaB project).
This will then be easy to use by running one script that will read the track data for all current tracks in BiaB then import those into Reaper instantly, or be able to select the track/s or track section to update to any fractional/decimal tempo map.
A total no brainer, giving total control to the users, way ahead of current way.
BBlugin uses bbw4 in the background to render tracks to lots of wav files that the Plugin reads. Needs upgrading to play the track section direct from the source files, giving instant generate/play instead of having to WAIT (the reason why users now use BiaB instead).
RealBand uses bbw2 in the background to render tracks to lots of wav files that RealBand will read. Also needs upgrading to play the track section direct from the source files, giving instant generate/play instead of having to WAIT (the reason why users now use BiaB instead).
EDIT: This is one you can try now that works with the BBPlugin without any mods
Inject BBPlugin Tracks into REAPER (Simple Script) This is injecting a multistyle from Biab of current tracks from track data txt.