How to Mod Any PSP on Firmware 6.61 or Lower! - Infinity 2.0 Permanent CFW - YouTube
Release: Infinity 2.0 – Enables Permanent 6.6x Custom Firmware for all PSPs! - Wololo.net
Picked up a PSP-1000 on firmware 1.0. Any reason to NOT be on 6.61? : r/PSP
CFW – Wololo.net
Ultimate VSH Menu PSP - GameBrew
PSP 6.61 Custom Firmware Install on any PSP - PSP, PSP Slim, PSP 3000, PSP Go & E1000 | Page 19 | Digiex
PSP 6.61 Custom Firmware Install on any PSP - PSP, PSP Slim, PSP 3000, PSP Go & E1000 | Digiex
How to Uninstall a CUSTOM FIRMWIRE From Your Psp and Install a OFFICIAL 1.5 Firmwire. - Instructables
PSP: First hacks for the new Firmware 6.61 - PRO CFW & Downgrader updated! - Wololo.net
PSP 6.61 Infinity Hybrid Firmware by Davee, LME & PRO CFW Patch | PSXHAX - PSXHACKS
PlayStation Guide
PSVita: Qwikrazor87 releases PSP 6.61 PRO-C f3 & Hello World 3.36FW with ePSP 6.61FW - Hackinformer
Modded Sony PSP 1000. 6.61 CFW Mod. 128gb. Charger and Battery - Etsy
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
Release: Infinity 2.0 – Enables Permanent 6.6x Custom Firmware for all PSPs! - Wololo.net