I am looking for some help with Basic Instructions on how to create a skin or mod of a vehicle.
I am want to start by modding a Ford Focus Estate version of my local police force, Grampian Police.

I have searched the net but have yet to find any really detailed and easy to follow instructions on how to create the right skins. I also wanted to create a new lightbox as you will see from the photo the lightbox (rather than lightbar) is slightly different.
Any help would be appreciated