Do you actually know how to build a computer? I have successfully built a computer before?
Please refer to the manual and check everything, sometimes you have to manually change the FSB speed to a lower setting - by switching the jumper to different pins. That is maybe why your motherboard keeps frying CPU's.
Example, sometimes motherboards are set by default to 133MHz/200MHz on FSB, and you will have to manually change the jumper setting so that it supports a 100MHz FSB speed - not saying this is your problem, but it could be.
[size=0.5]Full Aluminium ThermalTake Case
AMD Athlon XP 3200+ *400 FSB* Barton (2.2GHz)
ThermalTake Volcano 11+ Xaser Edition Air Cooling
1024MB Corsair TwinX XMS 3200 (Dual Channel 2x512) 2-3-2-6
256Mb XFX 7800 GS EXTREME
2x WD Raptors (10krpm 8MB Cache) 36.7GB using RAID -0
Video Logic SonicXplosion 5.1 Soundcard[/size]