Well here she is
Don't be put off by my work, I didn't put time into the model, I just wanted to get the technique in and show you guys who to make one.
In the render above you will notice the tracks are round unlike through out tje tutorial, thats because I converted the spline into an Akima spline specifically for the render.
*IMAGES ARE 1280x1024*
Edit lol, I put it in backwards, editing now
EDIT2; fixed
**EDIT 3**
One important note, if you want to export this, it would be best to make all objects "editable" this basically converts them to mesh, just select the object (even just the object parent) and press 'c' or click on the top button on the left tool bar.
so if you want the track to be a mesh, press 'c' whilst 'sweep nurbs' is selected, and same for the null objects.
"I want to put a bullet through my head everytime I think of you!!!"- Slayer