The Zett on X: "I have combined the three patchers into a single one, which works on 6.39, 6.60 and 6.61. No need for 3 separate patchers anymore :) It now also
PlayStation Portable homebrew - Wikipedia
Help on launching LME 661 : r/PSP
PSP Custom Firmware Guide For All Models 2023 - pspunk
PlayStation Guide
So i've modded my PSP with Infinity 2.0 LME and my PSP says it can be Updated to Version 9.99. Should I do it? : r/PSP
PSP Custom Firmwares 6.xx ME-2 and 6.xx LME-2 are now available! - Wololo.net