All he needs to do is go to the games settings menu and then make sure he has BD Mirror setting clicked. I also had this game in Rebug 4.30 I was getting black screened, but no longer the first screen you get will be the auto save screen.
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If you are getting an error make sure Multiman writes the permissions for you first if you get a screen about the coding of the game then you are going down the right path. CEX and DEX shouldn't matter when playing that game, but I could be wrong.