ah it sounds like its asking you to enter the disc-key off of the case that comes with the game when you buy it so you can play online, if you have lost that key or don't have it, it gives you a option of buying it for 10 bucks... I do belive there is a way for a free 3 day or 1 week trial or something..... all in all I just skipped it and went to single player mode
however the copy I used was from a legit disc.
I used the key that came with the legit disc on my legit console, my CFW console stays offline unless im doing game or homebrew updates.
or navi-x lol.
since around the 3.55 cfw days, most mainstream online games for playstation come with a key on the jewel case to prevent piracy, this key can only be used with one PSN account.
The key is only needed for online play and is not needed for offline.
I have come across this with Far Cry 3, Twisted Metal & a few others.
PS3 SLIM - 3.50 OFW> 3.55 OFW> 3.55 GEOHOT CFW> 3.55 WUTANGRZA CFW> 3.55 KMEAW CFW> 3.55 REBUG CFW> 3.55 JB2USB TB CFW> 3.55 REBUG TB CFW> 4.21 ROGERO v1.00> 4.30 ROGERO v1.03> 4.30 ROGERO 2.00> 4.30 ROGERO 2.03> 4.30 REBUG