After all that go into recovery mode and make sure that your gamefolder homebrew is set to 4.01 Kernal. Don't have it at the 1.5 Kernal.
And also make sure that you have it set to M33 driver- No UMD, in the configuration menu.
Now go to your XMB, the main screen when you turn on your PSP, and scroll down through all the games you have until you find Guitarway to Heaven. Now press X and enjoy the game.
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