Sony PSP CFW 6.61 on PSP-1000 and PSP-3000 – McRetro.net
Release: Infinity 2.0 – Enables Permanent 6.6x Custom Firmware for all PSPs! - Wololo.net
PSP FW 6.61 PRO-C2 - Hackinformer Forum
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,
Atomic Pro C2 Skintec W PSP Medium - Howl Adventure Center | Bayfield, WI