Well, I looked over all my old tags from a few years ago and what I came up with by looking at my warthog I had two models, one was fully complete with the regions of hull and tires. I exported it as hull_base.jms, I then deleted everything except the tires. I changed the textures on them to the blurred ones and re-exported as _blurred.jms.

From there I'm lost, but I think all you do is compile it. I'll dig through my other tags tonight and get back to you. Hope some of this helped.