I have an ISO of Street FighterIII: 3rd Strike, Marvel Vs Capcom II, and Capcom Vs SNK II all on one image. On the disk before you load up a game it gives you the option of changing to soundtrack of each game to that of one of the other two. I've also seen people release alternate soundtrack versions of a couple different games.
Does anyone know how, or know where I can find information as to how to change the soundtrack in an ISO?