PSP 6.61 Custom Firmware Install on any PSP - PSP, PSP Slim, PSP 3000, PSP Go & E1000 | Digiex
Why do so many people prefer 6.60>6.61? : r/PSP
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
Sony Updates Its PSP Console with Firmware 6.61 – Download Links Available
PSP 6.61 Infinity Hybrid Firmware by Davee, LME & PRO CFW Patch | PSXHAX - PSXHACKS
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PSP: First hacks for the new Firmware 6.61 - PRO CFW & Downgrader updated! - Wololo.net
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Sony Updates Its PSP Console with Firmware 6.61 – Download Links Available
6.61 Infinity • lolhax.org
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Balázs Triszka on Twitter: "5.00-M33 on PSP-3000 with CIPL is happening! Will be opensource this time around. https://t.co/G0Avd6xFzh" / Twitter
PSP: First hacks for the new Firmware 6.61 - PRO CFW & Downgrader updated! - Wololo.net