PSP 6.61 Custom Firmware Install on any PSP - PSP, PSP Slim, PSP 3000, PSP Go & E1000 | Digiex
Infinity 2.0 released for the PSP, allows for persistent CFW on all models of PSPs on 6.60 and 6.61 | Page 2 | GBAtemp.net - The Independent Video Game Community
PSP Official Firmware | ReviveToday
How to Update An Old 5.50 CFW PSP To 6.60 Pro-C CFW | Super Easy PSP MOD... : r/psphacks
PSP Official Firmware - Hackinformer
New Custom Firmware 6.60PRO B-9 PSP GO Download LCFW - YouTube