Release: Infinity 2.0 – Enables Permanent 6.6x Custom Firmware for all PSPs! - Wololo.net
Free Mobile Gaming - PSP (L)ME Firmware 6.20--2.2, 6.39-10.2, 6.60-2.2: Bug Fixes For The Ultimate CFW Software Download
Hack, Install Custom Firmware on Sony PSP-E1004 Street
Updating The PSP System Software to 6.60 / 6.61 - pspunk
Release: Infinity 2.0 – Enables Permanent 6.6x Custom Firmware for all PSPs! - Wololo.net
PSP POPS for 6.60PRO-B9 Released - MateoGodlike
PSP Firmware Update 6.61 | GBAtemp.net - The Independent Video Game Community
How do I uninstall 5.50 GEN-D3 from this silver PSP-1001? I am giving these as Christmas presents and want them all on 6.60 PRO-C2. : 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 Alive: Update to OFW 6.60
Remove cfw 6.61 pro-c | GBAtemp.net - The Independent Video Game Community
Tutorial] - How to Mod PSP with firmware 6.20 e 6.60 - YouTube
ALL TECH NEWS: PSP 6.61 Custom Firmware Install on any PSP - PSP, PSP Slim, PSP 3000, PSP Go & E1000
Downgrading 3004 from 6.61 PRO-C2∞ to 6.60, error LPTFFFFFFFE, still boots into 6.60, UMD not working · Issue #2 · DaveeFTW/Chronoswitch · GitHub