"Windows XP Pro 64"
i wouldnt use windows 64 bit edition yet as not may programs support it, (you will run into more difficulty than it is worth) i would try windows xp pro or xp media edition.,
your ammount of memory looks ok, which you can buy from (www.crucial.com)
you can get graphic cards from crucial too, i would suggest at least 128 dedicated graphic memory, but 256 will be even better
i wouldnt use windows 64 bit edition yet as not may programs support it, (you will run into more difficulty than it is worth) i would try windows xp pro or xp media edition.,
your ammount of memory looks ok, which you can buy from (www.crucial.com)
you can get graphic cards from crucial too, i would suggest at least 128 dedicated graphic memory, but 256 will be even better