GTA3 - Not the normal question

[junkygreeny]

Hi I have just got GTA3 and installed it but frequently the screen goes all grey, kind of like a fog or something and I cant see where I'm going when driving or walking. It seems to stop if I stand still, could this have anything to do with the copy that I am using to run it? I installed it using my copy to see if it coppied right but I am using the original disc to play it, I have a feeling it may be something to do with my crappy video card though. I have a 32MB PCI SiS card. Has anyone else experienced these problems?