- Copy the UPDATE folder into /PSP/GAME/
- Get the 5.00 sony update from here: http://www.megaupload.com/it/?d=4KJDUN90, and put it in same folder, with name "500.PBP".
Alternatively, you can let the installer to download for you via wifi.
- Run it, the update will be done by Sony updater. At the end when you are asked to reboot the
PSP pressing X or O, do it.