Disconnect the USB. Go to Game > Memory Stick on your PSP XMB menu to view and boot the game. Optimizing Performance and Controls

Short checklist to get started (decisive, assuming you want to play on PC/emulator)

To run these fan-made games, your playback device must meet specific requirements depending on whether you are using real hardware or an emulator. For Real PSP Hardware

To play custom homebrew or ISO backups, your PSP must have Custom Firmware installed (such as PRO-C2 or ME). A Computer (PC/Mac): To transfer files.

Do you already have installed on your device? Share public link

The files you need are typically ISO or CSO format of Far Cry 2 (PSP) or Far Cry Legacy (JPN) .