sorry for the late reply, a few questions:

What is your graphics card and how much system ram?

When you say CD do you mean you've burned the .iso/.mds etc file to an actual dvd then tried to install from that or are you mounting the image using daemon or alcohol?

Are there any updates included on the cd? It may be the crack is for a different version ie crack for version 1.2 and your running 1.0, in my experience this may not work.

Try downloading another crack from gamecopyworld.com.

Have you got the latest graphics card driver?

Hopefully youve sorted this all out by now anyway,