http://ecomodder.com/forum/showthrea...d-e-18151.html
http://ecomodder.com/forum/showthrea...lly-13149.html
I too agree about the edges and an air dam. That would be the easiest things to see results with.
( To me it looks as though the top half is already smooth, but the area just behind the cab has edges that are too sharp. )