How To Install PSP 6.60 PRO-C2 Custom Firmware! - YouTube
Tutorial : install 6.61 Pro c2 cfw - YouTube
PSP升级6.60C3固化破解教程及文件下载| Troy小法师
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,