How to downgrade your PSP Firmware with Chronoswitch - Darthsternie's Firmware Archive
How To Downgrade PSP 6.61 To 6.60! (Chronoswitch Downgrader) 2017! - YouTube
Downgrading PSP 2000 using Chronoswitch v7 from 6.61 to 6.60 - error CAAFFFFFCF7 · Issue #1 · DaveeFTW/Chronoswitch · GitHub
Release: Infinity 2.0 – Enables Permanent 6.6x Custom Firmware for all PSPs! - Wololo.net
Updating An Old 6.20 CFW PSP To The Latest 6.61 CFW! - YouTube
PSP FW 6.61 Downgrader - Hackinformer Forum
How to downgrade your PSP Firmware with Chronoswitch - Darthsternie's Firmware Archive
Console info - How To Easy Jailbreak Any PSP 6.61 CFW Permanent. Tools : - 6.61 PRO C2 - infinity-2.0.3 Video Tutorial : https://youtu.be/l7-lmtrVbJo | Facebook