1. Take the machine completely apart - bieng very careful, identify all components and write down model numbers, then trace the model numbers to the correct oem drivers

-or-

2. Run HWInfo (download from the Tech Tools/Utilities Page) and see if that correctly identifies all your components.

-or- (Best)

3. Pay the fifteen bucks for a complete restore cd - and have the piece of mind to know that if the same thing happens again you have the cd.