PSP: First hacks for the new Firmware 6.61 - PRO CFW & Downgrader updated! - Wololo.net
Sony Updates Its PSP Console with Firmware 6.61 – Download Links Available
Risen from the dead: PSP Firmware 6.61 is now available! - Wololo.net
PSP Custom Firmware 6.00-6.61
PSP 6.61 Infinity Hybrid Firmware by Davee, LME & PRO CFW Patch | PSXHAX - PSXHACKS
How to downgrade your PSP Firmware with Chronoswitch - Darthsternie's Firmware Archive
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
Updating The PSP System Software to 6.60 / 6.61 - pspunk
Update to 6.61 Infinity? : r/PSP
How To Easy Jailbreak Any PSP 6.61 CFW Permanent - Consoleinfo
GitHub - TheOfficialFloW/Adrenaline: Custom Firmware 6.61 Adrenaline for the PSP Emulator
PSP 6.61 Infinity Hybrid Firmware by Davee, LME & PRO CFW Patch | PSXHAX - PSXHACKS
PSP GO 6.61 Infinity Permanent CFW (PRO) Full Tutorial! 2017! - YouTube
Mandatory PSP Firmware 6.61 Released Today, First in Three Years - Hardcore Gamer