Okay recently when iv been doing the prestige hack i get an error that wont let me load any file, and it is NOT the error you are suppose to get when you load the error file! So i have found a simple way to eliminate this problem!
First your going to want to enter a private match with both of the files (prestige & error) and shoot around for 10-20 seconds WITH the patch installed! This validates the profile! Then just carry on how you would normally do the prestige hack, just delete the patch... etc. etc.
already knew this since its in the original prestige hack tutorial and leaderboard hack tutorial(premiums would know) but i guess its good if someone didnt catch it in those threads