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.
load the error file and prestige, and quit mw2, and save the files to the usb drive. Then everytime you prestige hack, those files are not corrupted, so when you prestige hack now, just delete patch, start patch blocker , do the proxy settings, and prestige hacks takes 2 minutes