Instructions
Insert the "God of War: Ghost of Sparta" disc into your PSP.
Navigate to the "Game" menu.
Select "PSP Update" from the list. Select "Start" to begin the update.
Select "Accept." Press "X" to begin the firmware update. Your PSP will automatically update its firmware from the "Ghost of Sparta" disc. After the update is completed, the PSP will restart.
Navigate to the "Game" menu and select the "Ghost of Sparta" disc icon to begin the game. The game will load now that the proper firmware has been installed.