Okay, but first I have a question.
I have a 512 MB stick of RAM, but Windows XP is using well over 200 of it, not leaving enough for Doom 3 to meat its minimum requirements. Could this be the problem? If so, can I play Doom 3 in safe mode? There, I have enough free ram to play it. All I need is to find out how to load the CD driver and Video card driver and onboard sound driver.
If this COULD be a solution, than please show me a link to an explaination fo how to play games in safe mode.
And I'll check out that program you suggested.