Haha, awesome! Yeah, It's pretty much what inspired my name. That sword was badass.
Also, gamesniper nailed it in the head. It's really simple, it's literally like instantly any official firmware. Except for this one you have to go into recovery menu and then install. (Then again, this was only needed IF you were already on 3.55)
People have reportedly done it without going to recovery menu, just simply - 3.41 OFW -> 3.55 Kmeaw CFW.
If you need more help, just ask. Better to just ask than to get an expensive brick, aye?