http://xyhd.tv/2010/05/how-to/gaming/xbox-360-controller-mod-for-rapid-fire-melee-and-sprint-button-relocation/ This mod relocates where the analog stick clicks take place. By adding two buttons to the bottom of the controller, you can sprint more easily, and don't jostle the controller when you are trying to hold your breath while sniping. The controller also gets an upgrade to a hair trigger for faster shooting. This is a great controller for Call Of Duty, Battlefield, Duke Nukem, Brink and other First Person shooters, but the hair trigger doesn't work well for race games.