hi i have got an iso from my friend of Metal Gear Solid Portable Ops and when i load it the screen just goes black. I read other topics and tried the ideas but they just produce a black screen. i can hit the home button and that works. i have a UMD in the psp and disabled no-umd. (i am running fw 3.03 oe-c)can anyone plz help me i realy dont wana have 2 bring my umd's to school?