How to downgrade your PSP Firmware with Chronoswitch - Darthsternie's Firmware Archive
6-60 6-39 6-38 Downgrader PSP - GameBrew
4 Ways to Downgrade a PSP - wikiHow
4 Ways to Downgrade a PSP - wikiHow
PlayStation Vita - Wikipedia
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
Remove Infinity and CFW with Chronoswitch - YouTube