How to install 4.81 CFW from 3.55 OFW on your PS3! - YouTube
Got all this for 90CAD. It's on version 4.81. My FAT PS3 is on 4.84 REBUG. FAT PS3 won't let me sign into PSN until I update...does another CFW exist or should
PlayStation 3 CECHL01 w/ CFW 4.81 Custom Rebug Firmware PS3 Sony Fat 80 GB PS3 | eBay