Put some tread on the tyres if you are going for a realistic look...just a bump should do it. Lit up like a Xmas tree? in what way mate? you mean the usual truck mini lights? Also I would think about (depending on previous question) whether this will be a day or night shot for the final render. Did you end up getting the headlight issue sorted out?
cheers bullet
bullet1968
"A Darkness at Sethanon", a book I aspire to model some of the charcters and scenes