Add set_node_defaults in the meshwheels section. Play with the second value set_node_defaults -1, -1, -1, -1. Also you should add separate snd on front and rear.
Here's something I've been working on last week ago. A 2 door BMW E39. New UV, custom Pandem kit based on the e46, also scaled to it's real size (based on the mv4 n/b) and much more.