tigerjk1410 follow the video exactly if you do have 3.30 oe-A but after that make sure your kernal is set to 3.30
after you do that the .prx's should work fine
if you kernal was set to 1.50 before becasue you were using homebrew just keep the kernal set to 3.30 and move all the homebrew's into the psp/game150 folder and keep the mapviewer and mapviewer% folders inside psp/game folder
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