I tried installing 6.61 PRO C2 and infinity v2.0.3 on my psp 3001 (following the instructions on the CFW guide of this subreddit) but it just shows corrupted data when I disconnect,
PSP Firmware Update 6.61 | GBAtemp.net - The Independent Video Game Community
Sony Updates Its PSP Console with Firmware 6.61 – Download Links Available
How to downgrade your PSP Firmware with Chronoswitch - Darthsternie's Firmware Archive
Release: Infinity 2.0 – Enables Permanent 6.6x Custom Firmware for all PSPs! - Wololo.net
Tutorial: Installing Infinity - 6.61 Permanent Patch for LME & PRO CFW - YouTube
Tutorial] Install PSP 6.61 Pro-C Infinity Custom Firmware | GBAtemp.net - The Independent Video Game Community
How To Downgrade PSP 6.61 To 6.60! (Chronoswitch Downgrader) 2017! - YouTube
Mandatory PSP Firmware 6.61 Released Today, First in Three Years - Hardcore Gamer
How To Update Any PSP To Official 6.61 In 2018! - YouTube
Risen from the dead: PSP Firmware 6.61 is now available! - Wololo.net
Sony Updates Its PSP Console with Firmware 6.61 – Download Links Available
Upgrading PSP OFW 3.90 to 6.61 without a battery : r/PSP
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Picked up a PSP-1000 on firmware 1.0. Any reason to NOT be on 6.61? : r/PSP
Easy Method - PSP How to install PSP 6.61 Pro C2 and if not showing games list on your psp but first download the file�- http://youtu.be/w4xFduw8cdw 6.61 Pro C2 Download- http://www.mediafire.com/?zd268rwbc5sui2e/ DarkSpeed
4 Ways to Upgrade Your PSP Firmware - wikiHow
Sony Updates Its PSP Console with Firmware 6.61 – Download Links Available