Well at this very moment I'm actually searching through two different save files to find the values to change what moveset a character has. I was wondering about that and how you imported SCIV's movesets into the game, seems like a huge discovery if you ask me. I wouldn't mind looking myself, I just thought it'd be easier if you could help me haha. :) Thanks anyways dude, hope to hear back from you.
There's quite a bit of info about this over at xentax forums. I personally haven't done anything regarding savefiles, so I can't help with that. The moveset changes I did was by replacing the actual moveset files.