This video should help you to create your own skins for the mod, in this example I create a rough look of a Cadian 8th trooper. With more time and care, you can create very nice looking skins like those already in the mod!
For viewing and downloading the video, please go here: Drive.google.com
At some points in the video auto or video has cut out, but I checked and these do no have an impact on its use. The only exception is the bit about editing the helmet - The helmet skin wrapped to the model is the helmet in the parts.dds, not the one in the unit.dds
Apologies for the bad quality, I'm not a youtube star!