How to Mod Your PSP on Firmware 6.61 or Lower! - Infinity Permanent CFW - YouTube
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I finally put CFW 6.61 Infinity on it! : r/PSP
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Install PSP 6.61 Pro-C Infinity Custom Firmware | GBAtemp.net - The Independent Video Game Community
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 6.61 Infinity Hybrid Firmware by Davee, LME & PRO CFW Patch | PSXHAX - PSXHACKS
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PlayStation Guide
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PlayStation Guide
PlayStation Guide
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[PSPHACKS 1.02] How To Install 6.61 PRO-C2 using Infinity 2.0.3 Permanent Custom Firmware - YouTube
PSP: Infinity 2.0 – Permanent 6.61 Custom Firmware for every PSP! - YouTube
How To Mod Your PSP - CFW 6.61 PRO Infinity - YouTube