Hi, saw that no one had answered your post...so I thought up something..hope it helps...
http://images.google.com/images?hl=en&lr=&biw=1260&q=forklift+&btnG=Search this is an image search on google that you can use as a guide
Take some square cakes, stack them, and then carve the bottom shape of the cake out, then take straws or wire, cover it with tin foil and then cover with fondant for the window frame, to make the forklift apparatus probably melted chocolate would probably work best.