For some who have seen my replays I am using FaceTrackNoIR software with my Plexgear 720p Cam.
What this software is, is that it's a cheap / almost free version of the TrackIR where you only need a CAM and the Software which can be purchased for roughly 2,5€. Think about a Cam you might have laying around or a cheap one you wanted to buy then you add that with this software and you get a cheap Face Tracking that doesn't cost a fortune!
I would highly recommend this for users who doesn't have much money and want a quick but also a semi-solution for now!
My quick guide