Just go ahead and let multiman change the param .sfo to 3.41. It won't affect the retail disc you have bought so there is no risk. I tried to look briefly but couldn't find what firmware the game requires. What does it ask you to update to if you run the disc from the xmb?
Edit: I just noticed the game was released last month so its not very likely to work.
Last edited by Natepig; 12-26-2011 at 05:03 AMReason: Automerged Doublepost