freetrackHead tracking should work automatically. If it doesn't respond, check the game's settings for a TrackIR or head tracking option that may need to be enabled.
Thanks to malinkb for helping with this guide.
Reported by DiRT Rally 2.0 players: start tracking first, then launch the game - Codemasters titles check for the tracker at startup. If the status stays yellow, restart the game with tracking already running rather than restarting LookPilot.
Shaky or twitchy tracking is the most-reported issue across all games, and it almost always traces to the camera picture, not the game:
Press Alt+C (default) to recenter tracking on your current head position at any time - do it once seated in your normal driving position, looking at the center of your screen. If you find yourself recentering constantly, move the webcam so it faces you head-on (an off-axis camera makes turned positions read as drift) and recenter while looking at the horizon in-game, not at the camera.