Car 'Skinning' or Texturing

I would like to make custom paint jobs for some cars in the game, I have photoshop etc, but which files would I go about editing, for example there are hatch_c, and hatch_s, I don't know which one to edit, or are there templates for the cars that I can use?

Thank you, Joe.

 

***_c.dds is the one you want to be editing for skins. I've included a template for the hatch to help you and anyone else who needs it. It's 2048x2048px so you might need to resize it.

 

Much appreciated thank you