Signed LCFW (Light/temporary Custom FirmWare) for PSP models running the official 6.20 CFW. This version also has an option to do a full install, and works on any PSP that can run the 6.20 OFW.
I went to auction at a mom/pops video game store few months ago that was closing, and bought 11 slims for $200, 1 was DOA but 10 work fine. so hella deal. Already rgh3'ed 8 of them. But most younger kids don't even want anymore, unless it plays stupid "fortnight", or newer shit.