Download the SprintR tray app so you can assign the keys at will, and modify the dead-zone settings. The app will allow you to use SprintR for your existing non-VR games as well.
Primarily tested with the Oculus rift, this test-app has 3 scenarios. The first is a simple walking simulator so you can get a feel for how SprintR operates, the second is a horseback demo were you find and shoot werewolves, and the third is a simple FPS zombie demo. Have a look, and check out the various ways you can use the SprintR.