Don't be stupid and enable your codes before you get there. Wait till your in the server. If it still freezes then one or more of your codes don't work in which case you'll have to test them one by one. If all else fails, disable all game prx's from your PSPs BIOS menu. If that works then turn them on individually to see which is causing the problem. When you do find out which prx it is go download a new version of it or don't use it at all.