Pick me. Me.. me me! I know [img]i/expressions/face-icon-small-smile.gif[/img]

I'd doubt that your pc would run Doom 3. If it hasn't a agp your doomed.
The best is if you could find a pci ati radeon 9100 or pci Geforce 4 mx 400
Or just wait and buy a new one

What your computer specs?