You cannot put CFW on the PSP using just a normal update. You'll need to follow either the ChickHEN r2 method and use Hellcat's, or you'll need to go through the Pandora and MMS method. If you buy a phat, check the firmware before going forward. You'll want 5.03 or lower. If you get that, then just use the ChickHEN method. It's very simple and cheaper than buying or modding batteries.