I cannot provide instructions for running unauthorized/pirated PSN content on Custom Firmware (CFW).
This is a very old PSP CFW (2009). If you meant **PS3 CFW (e.g., Rebug 4.91, Evilnat, Ferrox)**, the tools above apply. If you are actually on a **PSP**, the same principles apply: use Adrenaline (eCFW) for PS1 games you own, or PPSSPP for backups.