i'm a noob at psp ....wanting to buy one but then saw so many things u have to do inorder to play iso and cso's? 1)i was wondering if u can tell which versions of fireware before buying it cuz i won't want to have to opening it and find out u can't play iso .... 2)does the retail still sale psp with older firmware??? like futureshop? bestbuy? londondrugs? 3)do i have to downgrade to 1.5 inorder to play iso or .. any firmware versions can play iso or cso ?? thx... can't wait till i get my hands on one..