Release: Infinity 2.0 – Enables Permanent 6.6x Custom Firmware for all PSPs! - Wololo.net
4 Ways to Upgrade Your PSP Firmware - wikiHow
PSP - POPSloader 6.60 PRO (PS1 on PSP) | PSX-Place
Easy Method - PSP How to install PSP 6.61 Pro C2 and if not showing games list on your psp but first download the file�- http://youtu.be/w4xFduw8cdw 6.61 Pro C2 Download- http://www.mediafire.com/?zd268rwbc5sui2e/ DarkSpeed
PSPHACKS 1.01] How To Install 6.60 PRO-C Fix 3 using Infinity 2.0.3 Permanent Custom Firmware - YouTube
Release: Infinity 2.0 – Enables Permanent 6.6x Custom Firmware for all PSPs! - Wololo.net
Hack, Install Custom Firmware on Sony PSP-E1004 Street
PSP 6.61 Custom Firmware Install on any PSP - PSP, PSP Slim, PSP 3000, PSP Go & E1000 | Page 19 | Digiex
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
Brightness control v1.6 plugin for PSP ( works on 6.20 , 6.35 , 6.39 , 6.60 and 6.61 ) : r/PSP