Reply to how can I get better latency on xp mc

Ok so I got some new parts to make a small dj computer... y? well I dont trust vista and dont have the money for a mac. Anyways here is my pc specs:

-Win XP Media Center sp3
-AMD Athlon 64 X2 5400 Brisbane 2.8GHz Black Edition
-Mushkin ddr2 1066 4gb
-ASUS M3A78-CM AM2+/AM2 AMD 780V Micro ATX AMD Motherboard
-LG 22X DVD