I was on REBUG CFW, let my friend borrow the PS3 and he tried signing on to PSN, which I don't have setup. PS3 tried updating to newest OFW, but now is stuck on installing @99%. I have to unplug it or it'll be stuck indefinitely. This is how I got my PS3 back. I read online that formatting / upgrading the HDD is the solution for the update loop, but I'm not so sure what CFW I was on. Can I use the latest (4.81.1 REX), place it in a USB, and update that way when I put in a new HDD? Can I save the old HDD, I have some games/saves that I'd like to recover if I can. Am I screwed and now in OFW?