I am used to using Rfactor and the like for doing things like car skins. And not sure if this game is at all moddable! But saw some great skins, do they replace the ones in the game or can you add loads of them? Would like to use a few in Dirt Rally. Is there a noobs guide for this, I don't like hacking around in game files that much, not my area of expertise so something simple and basic to follow would be great.