The main areas of the car are not for amateurs. Film is very difficult to apply... and the Challenger is not an easy car to work on. If you are looking for an installer let me know. I may be able to help you out.
I installed it on the front of my 09. The bumper piece was a real PITA mainly because it is one big piece, there are nasty compound curves and sharp edges and I was working by myself.
The other pieces were pretty easy to install.