Hey man, just a couple questions since you seem to have some knowledge about the subject. I recently bought a PSP to replace my launch day PSP. I believe it's a PSP 3000, but the serial number on the bottom says PSP2001. My question is ... is this a PSP 3000? ... and how do I identify the model of my PSP? Also, I updated the firmware to the latest 5.51 ... how can I downgrade to 5.03? ... and if I do, will I still be able to use the PSN Store, play wirelessly, and use other features of the PSP? Thanks, my contacts are on my profile page if you could please answer these questions and point me the right way.