It's that simple? I just add the codes in cod tools, resign rehash, put back on my hard drie and then go join a co op game?
---------- Post added at 08:11 PM ---------- Previous post was at 08:05 PM ----------
Okay, I downloaded the gamesave you provided in the description, I put in my profile and device ID, I resigned and rehashed the put it back on my hard drive went into co-op campaign > xbox live > nazi zombies > der riese and nothing happened.