You are just asking for problems, seriously. It's built on .net which is a resource hog. NT hangs on me sometimes and I am running dual core 2.0ghz with 2 gigs or ram. Not often but if I switch an instrument in a chart sometimes it never loads. Don't do it.
sorry i didn't get back to you on the other thread, but i ran NT on a P3 with XP and 384mb of ram and it was fine. unless you're doing some very cpu intensive calculations on every bar update, you'll be fine. backtesting and backfilling charts did take a while though...