I have a xbox 360 theme on psp and if I want to go to 3.71m33 do I have to reflash my psp. I can use U.P.M.S to get to 3.71m33 on my fat psp right? Then I just have to upgrade using the addon-2. Is it worth going to 3.71m33-2 anyways? Can you still play psx games as eboots in your game folder?