PlayStation Portable · Firmware & homebrew setup

1. Check model and firmwareRead Settings → System Settings → System Information. ARK-4’s live install route uses official 6.60 or 6.61 on retail 1000, 2000, 3000, Go and E1000/Street. Follow the project’s separate migration instructions if PRO, ME or another CFW is already installed.
2. Prepare the correct storageBack up the existing card and saves. Connect by USB or use a reader. Keep the Memory Stick/Go storage’s existing layout. The table below distinguishes the drive’s root from folders inside PSP.
3. Install ARK-4 live accessIn the final ARK4.zip, copy ARK_01234 into PSP/SAVEDATA/ and ARK_Loader into PSP/GAME/. On Go, put both on the same storage. Eject safely and launch ARK Loader from Game. It must be relaunched after a full reboot unless you separately install cIPL.
4. Add a native appExtract the selected binary archive. Put its complete app folder, including EBOOT.PBP and bundled resources, under PSP/GAME/. Launch it from Game → Memory Stick or System Storage. Do not copy the unextracted ZIP there.

On a computer, X:/ means the USB drive letter: X:/PSP/GAME/ maps to that device’s ms0:/PSP/GAME/ or ef0:/PSP/GAME/. An app may still use a hard-coded ms0 path; check its requirements. Street has no WLAN, so network features need another model. PC assistants and Vita VPKs are separate from these native PSP files.