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PSP FAQ - How Do I Update My PSP Firmware?
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PSP - CFW Tutorial [All PSP Models] PSP 1000/2000/3000/Go/E1000 (Basic Tutorial) | RomUlation
Picked up a PSP-1000 on firmware 1.0. Any reason to NOT be on 6.61? : r/PSP
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PSP update: 6.61, firmware, PlayStation
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