First of all, I'm sorry it took me a while to respond
Second of all, I'm not that "advanced" in 3D Modeling and those terms you used, such as regrouping the faces- I have no idea how to do that- I did find some way called UV Mapping to manually put a certain part of the picture of the 3D Model, but the only problem is that at the center of the model, the image duplicates itself- not sure how to describe it, so just look at the picture below:
The SWAT sign on the back should just cover the entire back- if you need the model and pic, just ask- I am unsing Zmodeler for the 3D modeling (but I can open and save the more common, 3D Studio Max). Thanks!