Well see before I buy a PSP, I have some questions to ask you all.... 1. Is there any way that I can downgrade a 2.61 PSP with TA-082 M-B??? 2. Can the PSP play .wmv or .mpeg format videos??? 3. How to play .iso games on a PSP??? A tutorial would be fine....... 4. And the most important thing is that which one is better??? The PSP or the Nintendo DS???