Infinity 6.61 Downgrade to official FW on PSP Go - YouTube
DOWNGRADE PSP GO 6.35 6.38 6.39 6.60 to 6.39 6.35 6.20 (NO PANDORA) - YouTube
Downgrading PSP 2000 using Chronoswitch v7 from 6.61 to 6.60 - error CAAFFFFFCF7 · Issue #1 · DaveeFTW/Chronoswitch · GitHub
PSP: First hacks for the new Firmware 6.61 - PRO CFW & Downgrader updated! - Wololo.net
Got this baby. System version is 6.39. Never been hacked. What should I do to hack it? 6.60 or 6.61? Confirmation button is O. Can I switch it to X with Infinity