How to Downgrade PSP Firmware - Nerd Bacon Reviews
How to downgrade your PSP Firmware with Chronoswitch - Darthsternie's Firmware Archive
Picked up a PSP-1000 on firmware 1.0. Any reason to NOT be on 6.61? : r/PSP
I was trying to downgrade my PSP go to 6.20, but it warned me that the [Resume game] feature would be deleted. Does that mean I won't be able to use the
How to downgrade your PSP Firmware with Chronoswitch - Darthsternie's Firmware Archive
4 Ways to Downgrade a PSP - wikiHow
How can I safely downgrade my Sony PSP firmware? - Ask Dave Taylor
4 Ways to Downgrade a PSP - wikiHow
DOWNGRADE ALL PSP MODELS FROM 6.60 6.38 6.39 6.35 6.20 TO 5.03 6.20 6.35 6.39 *NO PANDORA* - YouTube
4 Ways to Downgrade a PSP - wikiHow
I need an expert's advice. I bought this PSP and I want to hack it. The problem is I'm not sure if I can downgrade this firmware since its a permanent csw?