Oh, one more thing. You can request a 32bit disk (or 64bit of you have 32bit) directly from MS. The cd-key that comes with 64 works for 32 and vice versa.
nice! how did you do that? thats what about half my Steam crashes do and 100% of my Fallout3 crashes. i wounder if it worked for me if it would fix my random crashes as well. the only thing i ever tried was running in "Xp compatibility mode" and that didn't change a thing...