PSP: First hacks for the new Firmware 6.61 - PRO CFW & Downgrader updated! - Wololo.net
Infinity 2.0 released for the PSP, allows for persistent CFW on all models of PSPs on 6.60 and 6.61 | GBAtemp.net - The Independent Video Game Community
PSP 6.61 Infinity Hybrid Firmware by Davee, LME & PRO CFW Patch | PSXHAX - PSXHACKS
Install or use custom firmware on any 6.39 PSP [PSP, PSP Slim, PSP 3000, PSP Go] | Digiex
Custom Firmware with PRO | ReviveToday
PSP Custom Firmware Guide For All Models 2023 - pspunk