If you have a backup of your legally owned game in ISO format, you can play it on a PSP with like PRO-C. Steps to Install:

The ISO file typically takes up less than 50MB, making it easy to store.

Master the levels to earn high scores and unlock hidden secrets within the temple. System Requirements for Emulation

To run an ISO file on your physical PSP, you must have Custom Firmware (CFW) installed. Once your device is ready, follow these steps: