ok i have a fat psp and a slim psp. I have pandora and Rains MMS maker and i made a MSS to install 5.00m33 on my fat psp. When i put in my memory stick and then the battery and hold the left trigger the green light stays on for about 3 seconds then goes off. It wont run but if i put it in my slim it works fine and pops right up. So that means the memory stick is made right i just don't understand why it wont work on my fat psp. Could it be a mother board issue like i have a mother board that cant be hacked?