voorhees, howd you get to the skins? i want to do some designing.
I will try to explain, it is really easy but sometimes I make it sound harder then it is:
You need a file called scs_extractor.exe. Then you need to extract the base.scs from the main game install. So copy base.scs to the same location as scs_extractor. To extract it you need to get a cmd prompt up, goto the location and type "scs_extractor base.scs base" the last word base is the folder it will extract to.
You will then get a ton of files which will take a min or two to extract. In these files/folders is all the graphics which are in DDS format. I use photoshop with a DDS plugin to open and change them and save as DXT 5 when done. Now to get it back into the game you need to zip up the location, example if you found the DDs file in c:\Games\Truck sim 2\Vehicles\ Daf\Daf.dds that is the folder you need to zip. Get rid of everything else and just leave Vehicles\Daf (all the contents in daf should remain) you right click Vehicles and add to archive with winrar. Make it a Zip and set compression method to "store" Once done rename your zip to whatever.scs and bang this into your mod folder. Job done.
I hope I explained it OK I am a little crap at it
Might be an easier way but this is the way I am used to now.
EDIT: Or download a modded skin pack, rename it from whatever.scs to whatever.zip, extract it and mess with those DDS files then just zip it back up again.
Photoshop DDS plugin:
https://developer.nvidia.com/nvidia-texture-tools-adobe-photoshop
EDIT2: I guess you could rename base.scs to base.zip and extract it but I have not tried this, I figured if you could then why did they make scs_extractor.exe