Things You'll Need
Instructions
Connect the USB cable to your computer, then to your PSP.
Turn on your PSP, then go to "Settings" and "USB Connect." Your PSP will now be recognized on your computer.
Select 'Settings"; "Themes"; "Backgrounds" and "Original." Running a custom background when installing CFW 5.50 Gen-D3 may corrupt your PSP.
Right-click the CFW 5.50 Gen-D3 installation file on your computer.
Select "Extract Files" and select your PSP as the destination.
Select "Game" on your PSP, then select "XGen Updater."
Select "Flash Install CFW 5.50 GEN-D3" to install the custom firmware.