How To Install PSP 6.60 PRO-C2 Custom Firmware! - YouTube
Updating The PSP System Software to 6.60 / 6.61 - pspunk
PSP Official Firmware | ReviveToday
PSP Custom Firmware 6.00-6.61
PSP Custom Firmware 6.00-6.61
VERY EASY) Install Custom Firmware 6.60 PRO B10 PSP 1000, 2000, 3000 + DL - YouTube
Updating The PSP System Software to 6.60 / 6.61 - pspunk
How to Update An Old 5.50 CFW PSP To 6.60 Pro-C CFW | Super Easy PSP MOD... : r/psphacks
4 Ways to Upgrade Your PSP Firmware - wikiHow
PSP Custom Firmware 6.00-6.61
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
Hack, Install Custom Firmware on Sony PSP-E1004 Street