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How To] Downgrade Firmware on PSP Fat/Slim From 6.60 to 6.XX In Less Than 7 Minutes - YouTube
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Release] (L)ME Custom Firmware Collection - wololo.net/talk
4 Ways to Upgrade Your PSP Firmware - wikiHow
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PlayStation Guide
4 Ways to Upgrade Your PSP Firmware - wikiHow
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How To Downgrade PSP 6.61 To 6.60! (Chronoswitch Downgrader) 2017! - YouTube
4 Ways to Upgrade Your PSP Firmware - wikiHow
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How to Downgrade PSP Firmware - Nerd Bacon Reviews
