So, this is how i did this, for everyone that is confused about the OFW and CFW.
I was on 3.41 (downgraded from 3.55) i downloaded the OFW 3.55 from Sony and installed in XMB==>> System Setting ==> System Update and select Update via Storage Media (i did nothing else, just put on USB FAT 32, it's simple)
Downloaded the CFW 3.55 Kmeaw, and installed same as previous.
Downloaded the Rogero CFW 4.30, and installed same as previous.
Installed the latest multiMan, and there it goes, smooth as new.
ps: Tasted with Batman Arkham City, it worked fine, now I'm going with AC: R