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,
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
PSP Firmware Update 6.61 Goes Live, is Mandatory
How to Update an Infinity Modded PSP to Infinity 2.0 - The GamePad Gamer
How to Mod Any PSP on Firmware 6.61 or Lower! - Infinity 2.0 Permanent CFW - The GamePad Gamer
Updating The PSP System Software to 6.60 / 6.61 - pspunk