The tools needed to do a track are not really the problem, you'll "just" need 3DSmax, some kind of photoshop and an example scene.
But all the constrains around this to make a really complete track is another story. So without a proper tutorial it would be nearly impossible.
And the other problem is that we need to integrate the concept of "Mod" into the game before anyone can do his own circuits and f-jets.
But that's not what we're proposing at the moment. As you said, we are taking a unusual road to do our game. Game Play has always been our major concern, because we know that it's what makes an unforgettable, fun game. Of how many racing game do you remember the tracks names, even 20 years later ? How many you said ? One ? Ok I believe we're thinking oh the same one

(if you didn't guess, this game is called Stunt Car Racer).
We don't have many tracks in NSR (well, that have been released), because we polish them so much that you could think (and some people do) that we're mad. But game play is not science, or if it is, it need a lot of time to tweak.
New, even madder, tracks are comming. Stay tunned

P.S.: Welcome to another AMIGA Fan !! AMIGA POWWAAAAA