PS3Xploit Webkit Exploit - Install CFW from 4.82 OFW

My PS3 used to have a CFW on it too back when you used some USB dongle thing and held down a button after powering it on or something. It's been so long I've forgotten what it was called. But later on I updated it to a newer OFW cause I wasn't using the CFW features or wanted to play a newer game. So this interests me since I could potentially put a CFW on it again. I can't remember if I still have the upgraded HDD in it.