Menu, and game error

[tenninshi]

Well i just got this game and i'm trying to play it...
the game starts ok until it hit's the menu screen which is grey in the background and all the icons are a blurry mess...ignoring that fact i tried playing the game, so it starts loading and when it finaly finishes it freezes...the n i have to restart my pc

my specs are..

windows xp, service pack 2
Pentium 4 3.0ghz
1gb Ram DDR1
Nvidea Geforce 7600 gt

ps: Maybe it has something to do with the fact that i'm using SP2 and not 3, but i wanna be sure before i update...(when i update it f***** up my pc)