Can someone help me update my psp 1001 from 2.80 to 6.61 : r/PSP
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
PSP 6.61 Firmware Update for Windows - Free Download
POC: PSP 3000 CFW 6.61 Infinity
PlayStation Guide
Sony PSP Go Console Black Version 6.61 + Memory + 5 Games + USB Charger | eBay
Davee's Infinity CFW - Permanent 6.61 CFW on All 3000 & Go Models! | GBAtemp.net - The Independent Video Game Community
Risen from the dead: PSP Firmware 6.61 is now available! - Wololo.net
Update to 6.61 Infinity? : r/PSP
PSP: Infinity 2.0 – Permanent 6.61 Custom Firmware for every PSP! - YouTube
How To Easy Jailbreak Any PSP 6.61 CFW Permanent - Consoleinfo
How to Update Your PSP Firmware
PSP 6.61 Infinity Hybrid Firmware by Davee, LME & PRO CFW Patch | PSXHAX - PSXHACKS