Hi, I got a 1.5 psp lately it is a original 1.5 PSP, due to coming with the spider man UMD.I have a software called UMD Emulator that comes with the psp and it allows me to play game with .iso files i.e. pro evo 5. Now i have got some games that are .cso files been trying to play them on the UMD emulator and all they do is crash. What the solution??? Do I have to download that program Devhook? or am i doing something wrong . Thanks any help is much appreciated.