This is what we are talking about.

D_A, you wrote XP home every time XP x64 comes up, might wanna fix that
Since there is only XP x64 Professional

Also, what is up with that Desktop/Server classification? Any Xeon CPU is a server CPU, Sossaman as well as the Clovers, Harpers and Opterons. However, Q6600 should be Desktop.