Music Player

Could this be expanded to include an option to temporarily change or disable the map or default battle song as well?

Just replacing 24 (first entry) by FF here should do the trick. The other more tedious way is edit every regular formation. For randomness, see this thread.

Code:

C2/BF3B: 24 (Battle Theme)
C2/BF3C: 14 (Boss Theme)      
C2/BF3D: 33 (Atma Weapon)
C2/BF3E: 2E (Returner)        
C2/BF3F: 1A (Factory)          
C2/BF40: 3B (Final)          
C2/BF41: FF (current 1)
C2/BF42: FF (current 2)