My friend got a Slim with 3.60 and I just bought a 2200MAH battery and a 4gig stick. So I made my old standard battery and one gig stick into a Pandora set. But to downgrade his slim I see that I have to run that program that uses 3.4 and 3.5 and extracts PRX's. I put the program on my PSP with 3.71M33-2 and I put the 3.40 and 3.50 files in the psp/game/pandora_slim directory. I labeled the firmares 340.PBP and 350.PBP respectively. Now I go to run the program. I see it and run it and I get the message that it failed to load game followed by a number. What am I doing wrong? I heard you cant do what I am trying on 3.71M33-2. Is this true? I made a Pandora on this firmware and it does show the options screen when I put that battery in my PSP fat.