Here you go -->
http://download.cnet.com/GameMode/3000- ... =mncol;lst
It is free, and it does seem to help (although it could all be in my mind
)
There is another program that basically does the same thing and it is also free, just can't think of the name of it off hand.
When I use "Gamemode" I also shut it down after it has done it's thing. Then after the gig is finished restarting the computer then brings everything back to the way it was.