LDG_GEAR _MONITOR,
I would take the RAM back to the place you bought it and tell them you need nForce Approved RAM for your computer. I am 99.9% sure your problem is RAM that is not 100% compatible with nForce. See if you can borrow some Crucial RAM to test with.
If you live in the U.S.A. get two sticks of Mushkin Level II Black CAS 2.2.2 PC-2700 or PC-3200. It is 100% rock solid stable with nForce and overclocks like crazy should you ever need to.
Take Care,
Richard
P.S. Once we get your computer running up to speed, then we will work on FS2k4.