I don't have to use a umd to use bakonice or nitepr. I also have the ISO, so its not the umd problem. Does the game run normally if you take off nitepr and/or bakonice 2.0? Check to see if you take off bakonice because I've been seeing people having problems running nitepr and bakonice together. Also, check where you put the ISO, if it's in the correct spot. Do you have nitepr and bakonice enabled or just on your psp (disabled)?