Military ATV [WIP]

Heylo, some of you may of seen my artillery WIP and through the helpfull people in that thread i have created this, it's still a work in progress and i cant ffor my life figure out how to do the tracks so ideas would be appreciated. :)
http://www.picturehost.co.uk/free.one/ATVArtillery.bmp
Its the front of the Hanglund BV206 (click here) with a mounted machine gun (edited from my Artillery WIP) C+C Please...
*Please don't say "It needs colour" or "5/10 because no shading" as its a work in progress and that'll be added last.*

its good :)
and every1 look at my post also after u view his 1 do the awesome computer animations

;o with a bit of colour that will look awesome =]