Layering images in Photoshop

I'm currently in the slow process of creating a photo montage with my 1/6th scale GI Joes. The basic idea is that the Joes are being pursued by Cobra forces - nothing very new there. The problem is that I don't have any Cobra vehicles or a large amount of Cobra figures. The two main 1/6th scale vehicles that I have are the HMMWV and the Chenowth light strike vehicle. The Chenowth doesn't have any insignia, so it gets to be used as a Cobra vehicle.

I wanted to create the illusion of multiple pursuers and came up with an easy way to do that with photo editing. I thought that if I used a tripod and had my camera in a stationary place and moved the vehicle to multiple locations, I could edit the pictures in Photoshop.

Here's the first picture.

Second shot, moved the Chenowth a little farther back and to the left.

Third shot, a little farther back and again at a different position.

Here's the final result after several attempts. The picture with the most distant vehicle wound up being the background with the other pictures being layered over in order of the distance.

Careful erasing and shifting layers to get the desired effect of multiple vehicles. Worked pretty good to me!

What do you think?