I bought my brother a 512MB Sony Memory Stick Pro Duo, and it was working fine for him for a while. He was getting lots of space. However, I put an EBOOT on his stick, and it must have been a bad file, because when I ran it, his PSP shut off. Then I turned on his PSP, and a message came up that said "Your memory stick needs to be formatted" So, I did that.. and then it said it had... 40mb available free space. Is there a way I can get all the space this memory stick originally had back?