How To Downgrade PSP 6.61 To 6.60! (Chronoswitch Downgrader) 2017! - YouTube
PSP 6.61 Custom Firmware Install on any PSP - PSP, PSP Slim, PSP 3000, PSP Go & E1000 | Digiex
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Installing Custom Firmware on a PSP : 9 Steps - Instructables
3 Ways to Hack a PlayStation Portable - wikiHow
PSP: First hacks for the new Firmware 6.61 - PRO CFW & Downgrader updated! - Wololo.net
Infinity 2.0 released for the PSP, allows for persistent CFW on all models of PSPs on 6.60 and 6.61 | GBAtemp.net - The Independent Video Game Community
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PSPHACKS 1.01] How To Install 6.60 PRO-C Fix 3 using Infinity 2.0.3 Permanent Custom Firmware - YouTube
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UPGRADE ANY PSP CFW 5.00 M33 TO CFW 6.60 ME-2.3 [ PSP 1000 ] No TA-082 - YouTube
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Davee teases Infinity 2.0 – Adds PSP E1000 support, provides bug fixes and other improvements! - Wololo.net
Bought a PSP, trying Homebrew, looking for games - Community Blog - Level1Techs Forums
Hack, Install Custom Firmware on Sony PSP-E1004 Street
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
PSP 6.61 Custom Firmware Install on any PSP - PSP, PSP Slim, PSP 3000, PSP Go & E1000 | Digiex