I highly doubt it's the same checksum. The reason it wouldn't be a good idea to use the same checksum as another game is because it makes it that much easier to hack. The only purpose to having a checksum is to keep people from hacking the save, so if you use a checksum that has already been discovered (ie, Dead Rising 2) then you might as well not be using a checksum at all. And Marvel vs Capcom is the kind of game that the developers really do not want to be hacked. In fact, I can't believe I was surprised to learn that MvC3 has security; I really should have seen it coming. ;_;