I'm thinking of buying a PSP but I just want to ask some stuff 1st: 1. How much is a good deal for a used PSP(fat and/or slim)? 2. Which PSP's can't install Custom Firmware? 3. Do I need this http://www.dealextreme.com/details.dx/sku.12711 and this will help if I get a slim http://www.dealextreme.com/details.dx/sku.9477 for Custom Firmware? 4. Does the PSP have any Wi-Fi games? (I'm from the DS Lite days ) 5. How do I recharge the battery? Is it USB? 6. Once Custom Firmware is on is it safe to update with Wi-Fi? 7. Anything else I need to buy? Thanks!