By the way
I'm just curious why you call it x64? It's still the x86 architecture. It's actually just "64bit" or whatever.. Microsoft Windows XP 64bit..
Anyway, when you're playing with XP 64bit you're still running all of your old 32bit apps right? Like Plus! which will run in 32bit compatibility mode. You don't see much of a performance increase do you because its running in a compatibility mode and not taking advantage of the 64bit processing power. - From what i've read anyways..