It's the "C:\bb\RealTracks - Demos" directory we're talking about here.

PG himself said that it shouldn't be moved, but I was pointing out a way in which it could be moved without BIAB being aware of it.

As documented in the thread "Frozen RealTracks silent when song file played on a different computer", I thought that the reason I was experiencing silent RealTracks might be that I had installed RealTracks on drive F, and my colleague's computer (the source of the malfunctioning BIAB files) had them on drive C.