Things You'll Need
Instructions
Turn the PSP off and remove the battery and memory stick from the device. Insert the Magic Memory Stick into the PSP.
Insert the service tool battery and the PSP will turn on automatically. The PSP will be in service mode.
Press the "X" button to proceed in unlocking the PSP and installing custom firmware. Press the "X" button once more to verify that you want to install the custom firmware.
Press the "X" button once more to shut down the PSP. Replace the battery and memory stick with the normal ones.