Erwin, not just yet.
I've only done a Tiger, the 251 + gun and the Kubelwagon no American stuff.
I'm not much of a modder, what I did was take a German vehicle/gun modded by Aris, and using basic image software I converted the image to gray scale. Then I jacked up the brightness and contrast and then using the spray gun tool sprayed on a little "snow".
I left the wheels untouched.
Is the end result accurate? I don't know, probably not, but it looks ok to me. Also, I would feel funny uploading some else's work(Aris) with only a few changes.