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4 Ways to Upgrade Your PSP Firmware - wikiHow
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PSP 6.61 Custom Firmware Install on any PSP - PSP, PSP Slim, PSP 3000, PSP Go & E1000 | Page 19 | Digiex
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Picked up a PSP-1000 on firmware 1.0. Any reason to NOT be on 6.61? : r/PSP
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Lonely Dreams - PSP: Custom Firmware
PSP 2K Pink Color + 64GB Memory Card, Video Gaming, Video Game Consoles, PlayStation on Carousell
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PSP Official Firmware
/psp---sony-playstation-portable-console-534194895-5ba7b4ee4cedfd0025962aa2.jpg "PSP FAQ - How Do I Update My PSP Firmware?")
PSP FAQ - How Do I Update My PSP Firmware?
Release: Infinity 2.0 – Enables Permanent 6.6x Custom Firmware for all PSPs! - Wololo.net
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PSP Custom Firmware 6.00-6.61
