[7G]

Update everything on your PC and tweak it to the max that meaning shutting down uneccesary services...
Try these sites:

http://www.blackviper.com/WinXP/servicecfg.htm

http://home.comcast.net/~SupportCD/OptimizeXP.html

http://www.iobit.com/gamebooster.html

Also use lower buffer sizes like 256 or 128...I personally use 128
and try a good defragment utility like "O & O defrag"

Yorgos