most of the time, softwares use only Windows features.. Plus, this is an extra program installed. So I don't really see the point of using them aside maybe the possiblity to keep a backup of original settings.
Anyway.. try with TCPoptmizer, there is an option in the 2nd tab, for increasing the responsiveness of the whole pc. http://www.speedguid...t/downloads.php
or buy a mechanical keyboard with preferably cherry mx red or brown key switches. I personally use red ones.