I've got the side profile of my cab in various formats. A vector path in Illustrator, and I can make pngs from that (I'm sure).
What you are suggesting is to make the side of the cab transparent (or is a hole something else), and look through at the graphics on the layer below.
I hadn't thought of that because I was working from the example I posted which looks like the cab side is 'solid' and the background is transparent, and then the graphics have been cast on to it.
I will have a play in photoshop.