How To Easy Jailbreak Any PSP 6.61 CFW Permanent - Consoleinfo
Davee releases new Chronoswitch Downgrader for the PSP - Hackinformer
PlayStation Portable - Wikipedia
Got this baby. System version is 6.39. Never been hacked. What should I do to hack it? 6.60 or 6.61? Confirmation button is O. Can I switch it to X with Infinity
Release: Infinity 2.0 – Enables Permanent 6.6x Custom Firmware for all PSPs! - Wololo.net
PSP 6.61 Custom Firmware Install on any PSP - PSP, PSP Slim, PSP 3000, PSP Go & E1000 | Page 18 | Digiex
DOWNGRADE PSP GO 6.35 6.38 6.39 6.60 to 6.39 6.35 6.20 (NO PANDORA) - YouTube
How to downgrade your PSP Firmware with Chronoswitch - Darthsternie's Firmware Archive
How to downgrade your PSP Firmware with Chronoswitch - Darthsternie's Firmware Archive
PSP: First hacks for the new Firmware 6.61 - PRO CFW & Downgrader updated! - Wololo.net