PSP 2001 won't play any PS1 classic games from the PSN store with the CFW 6.61 LME-2.3. Changed the ISO to M33 to no avail. Am I missing something here? : r/PSP
HOW TO GET FREE GAMES ON ALL PSP's VERSION 6.61 (WORKING 2020) - YouTube
Release: Infinity 2.0 – Enables Permanent 6.6x Custom Firmware for all PSPs! - Wololo.net
PRO-C2 infinity UMD ISO mode blank. Help? : r/PSP
PSP 6.61 Custom Firmware Install on any PSP - PSP, PSP Slim, PSP 3000, PSP Go & E1000 | Digiex