Nice work! I currently don't have a good ETA on the tutorial (been busy/exhausted lately and it makes it hard to force myself to write a good tut

) but take a look at this tutorial. It's the one I've used to get my first tank exported.
Exporting a Tank for BF2/2142 - Battlefield SinglePlayer Forum
Few things to note that I did differently:
Instead of my road wheels (the ones inbetween the main turn wheels in the front/back) being springs and animating them through animated UVs, they are rotational bundles that I exported separate. So I also have a left/right road wheel export that I later child to the springs of the main tank in the editor.
The springs are going to be pyramid primitives in max. Don't turn them into anything else once you've placed them, they should stay primitives and then named correctly. Place them where the center of your wheels would be.
When you go to set up the deformation stuff for the tracks, make sure you zero out ALL verts first and there should be a button on the right that says something along the lines of "remove 0 verts" or something...I'd have to look, currently at work and not near max. Otherwise when you export, your springs might affect other verts instead of just your tracks regardless if they had a value or not. You'll see what I mean when you get to that point.
Let me know if you have more questions!
