The strange thing is that I don't use an ATI graphics card, I use Nvidia GeForce 8800GT. Since most people who seem to have gotten this problem have ATI, it get's a lot harder for me to solve it. So far i haven't found anyone more than me with this problem AND Nvidia...
I will try to install on another computer and if it doesn't work then, I return the game. However, if it works i will search more for the problem on my computer... argh...
Well, post any way you think it can be solved here i will test it anyway so ^^
(and thx so far)