System Update
Release: Infinity 2.0 – Enables Permanent 6.6x Custom Firmware for all PSPs! - Wololo.net
Updating The PSP System Software to 6.60 / 6.61 - pspunk
PSP System Update 6.61 - YouTube
How to Update PSP Firmware over WiFi or PC (Guide)
PlayStation Portable (PSP) 6.61 firmware download
PSP update: 6.61, firmware, PlayStation
4 Ways to Upgrade Your PSP Firmware - wikiHow
PlayStation Portable system software - Simple English Wikipedia, the free encyclopedia
Upgrading PSP OFW 3.90 to 6.61 without a battery : r/PSP
PlayStation Portable homebrew - Wikipedia
Download PSP 5.50 Firmware Update
PSP 6.61 Custom Firmware Install on any PSP - PSP, PSP Slim, PSP 3000, PSP Go & E1000 | Digiex
Updating The PSP System Software to 6.60 / 6.61 - pspunk
How do I know what Sony PSP firmware version I have? - Ask Dave Taylor
PSP update: 6.61, firmware, PlayStation
4 Ways to Upgrade Your PSP Firmware - wikiHow
PSP Firmware Update 5.5 Available Soon
PSP Firmware 5.00 now available | Engadget
Picked up a PSP-1000 on firmware 1.0. Any reason to NOT be on 6.61? : r/PSP
How to Update Your PSP Firmware
How To Update Official PSP Firmware In 2022 Without WIFI Access - YouTube
Sony PSP system firmware 2.0 update instructions? - Ask Dave Taylor
