to mac, I dont know what the licensing fees would be but I would pay a lot for pro note for note BIAB or PT guitar arrangements of real classics .. I am studying with a real master player, Ted Ludwig from New Orleans ( himself a student of Hank Mackie and Steve Mazokowski) and its great but he aint cheap either --- if you have all day every day to practice and/or have ears like Mozart you probably dont need stuff like this but for weekend warriors this is a real fast track to learning. So yes I would pay a lot more for really cool versions of real songs.