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Install or use custom firmware on any 6.39 PSP [PSP, PSP Slim, PSP 3000, PSP Go] | Digiex
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How to Update Your PSP Firmware
Sony Updates Its PSP Console with Firmware 6.61 – Download Links Available
PlayStation Portable (PSP) 6.61 firmware download
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Updating The PSP System Software to 6.60 / 6.61 - pspunk
PSP 6.61 Infinity Hybrid Firmware by Davee, LME & PRO CFW Patch | PSXHAX - PSXHACKS
How To Easy Jailbreak Any PSP 6.61 CFW Permanent - Consoleinfo
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
PSP GO 6.61 Infinity Permanent CFW (PRO) Full Tutorial! 2017! - YouTube
