Now, for the software......
The write-ups in english are incomplete, and a bit confusing. Down load the program
, and install it. Installation was easy, no worries about dll files or such. After installing your camera, and the program, start the FreeTracker program.
The first thing you do is select your camera on the middle right drop down box. If you don't, it will run a "demo" when you hit the start button. Once you select your camera, you can use the button to adjust the setting on your camera. Start at default, and once you get things up and running, you can tweak things as needed.
Next select the "3 points" clip (in my case), and then the "set up" button. Here is where you type in the dimensions of your rig. Turn your rig on, and click the "cam" button, then click the "start" button. Adjust the "threshold" slider to the right to lower the number of "points" the camera picks up until you have just the three on your rig.
From here on out its all tweaking. I had to adjust my camera a bit to get it to see the 3 points with out background interference showing up. Of course I wasn't easy on the thing, my room is well lite, and thats how I like it. A darker room would have made things much easier, but not as comfortable. There are a number of sliders to adjust the "speed" and throw" of your head movements as well as the input it gives in the game. The only adjustment to make in the game is to go to "views" and click the TrackIR box to enable it.
For the good.....
It was easy to put together, and once I figured out that you had to select the camera BEFORE you hit start the software wasn't too tuff to figure out. It worked the first time, even BEFORE I modified the camera, but works much better with the minor mods.
For the bad.....
I do take a "hit" to my system, and loose about 10 FPS max so far (pretty heavy furball so I think its about the highest), but that only drops me to about 50-55 when it gets nasty. Remember, I am only running a 3.2 gig CPU, and thats a single, NOT a duo. So its not too bad a hit.
Adjusting the "dead spot" sucks. It has 3 settings, small, medium, or large. While I like that as I get my head pointed towards the front it "snaps" to the front view and holds there, there is a bit of delay when I turn my head. I'd like to make the dead spot smaller, but havn't found a way to yet.
6 view sucks, but on the plus side, the views assigned to my stick are not turned off while in tracker mode. To get the 6 view I use my stick 6 view, and can slide my head around the headrest with head movement. A little strange, but I can get use to it.
Over all, I'm impressed ! For $30 I have a good working model, and I can really spend some time trying it out to see how I like it in the game. Should I decide I don't like it, I'm only out a few bucks. So far its been fun plying around with it, and I got my first kill with it last night

Getting centered up for my shot is a bit tuff. I never knew how much I was jumping around in my seat when in a good dog fight !!! Now I know "why" the wife was laughing at me all the time !!!