Now in the Plugin in Reaper I have disabled all wav generation but bbw4 is still filling up with RAM as the tracks are generated.
When it's set for no wavs bbw4 should be just reading the wav instructions from the XT2 ST2 and not decompressing wma files into RAM. If I put a fake empty RealTracks directory, Biab will generate up all the track data without loading any wma.
This should be quicker when you don't need wav renders. If you could disable that some way it would be good.
You have a Render Tracks option in the Style Picker to give wavs if needed.

But really you need to get that generate code in the Plugin.

There are AI code converters now, don't know if that is feasible ?