I think W is obsolete in w3d, so "U"&"V" simply correlate to the old "X"&"Y" of a cartesian graph.
I have never used Linear Offsett vertex mapping for getting treads to work, just straight up UVW.Its jsut a matter of having the tread meshes correctly named, and referenced in the INI with the right code.
As for draw modules, you can use as many as you want, just break up and export the model in its individual pieces for each draw module.
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