Well if you really want to do sort of a copy of that movie's tripod design the legs are way too short. You can find some more pics here (although I can't remember how far they actually really were shown in the movie as there were either close-ups or it was night or something else):

http://www.moviesonline.ca/movie_gallery.php?id=4797

Here you'll find a good design sketch from the side:
http://waroftheworlds.wikia.com/wiki/Tripod

Here you'll also find a good screenshot from the movie where you actually can see a bit of one walker:
http://www.theblackvault.com/wiki/index.php/Tripod_(The_War_of_the_Worlds)

EDIT:
Oh - have a look at this model:
http://sketchup.google.de/3dwarehouse/details?mid=9032f086544af1c7200aa0cf8d41daac

Enjoy your meal
Toast