PSP: Revision 2.3/10.3 of the ME & LME CFW is now available - Adds Pro Online support, DAX-format and more! - Wololo.net
PSP: Updating from the 3.xx OE CFWs to the 6.60 ME CFW - YouTube
Release: Infinity 2.0 – Enables Permanent 6.6x Custom Firmware for all PSPs! - Wololo.net
How to install a permanent CFW on any PSP without hardmod. | GBAtemp.net - The Independent Video Game Community
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,