[Michael Martin]

Done a quick video walk through. No commentary so any questions just ask. The showroom in the video didn't show but it was there when recording.

ETA 19:06gmt

This is f138 \ gimp specific.
Assumes you have basic knowledge of how to use imaging editing software. tools, layers etc. 
You need to work on the skin.xcf file. Then merge and export to a .dds
The gimp plugin just copy into the plugin folder. No need to run it (there is a read me with the file)
Watching the mouse shows you which options to use. 
Read Russells post. It will help with file placement and give you tips on how to edit.
Practice, Practice, Practice
I've been using image editing for 20+ years and still get   moments.
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Colour layer for your colour. Set Opacity at 50-60% to see the carbon weave.
Logos layer for logos. Erase mine as they are just there for reference.



You will need
gimp https://www.gimp.org/
gimp.dds plugin http://registry.gimp.org/node/70
template folder https://drive.google.com/open?id=1ffSEVY...fMqFoiAu22

I also recommend Russells tutorial as it has lots of usefull information
http://www.simracingsystem.com/showthread.php?tid=2249

There will be a full guide done at a later date when i find time using just opensource/free software.