Just tried this out here using the latest updated version of BB2012, loaded PGMusic Demo Songs, Combo->Freeze all tracks after hitting play to generate, SaveAs, then used USB memory stick to transfer from one computer to another that had no idea of this frozen and renamed songlist. All worked as expected. Load song, hit Play, no track generation at all, song immediately starts to play with same frozen version here.
Can't duplicate the problem.
*Are both of you using the very same version of BiaB (ie BB2012 with latest Update applied)?
*There is a possibility that you have one or more corrupted songfiles. Try freezing one of the PGMusic demos and see what happens when using that.
Don't forget about what I always do whenever BiaB stops doing something that it is supposed to do, I go to Options and hit the Return to Factory Settings button...
--Mac