As I saw no real skin for the D series I decided to make my own. Used the UV thing, followed all the steps of the Wiki page, and although the skin is finished I can't get it to work. Some help could be useful if you want to see it being released in the following days explanation: I can load the skin but it won't show up on the D series Pics:
i can't help you with advice.... but the artwork so far looks pretty cool, and appropriate for the vehicle. nice work!
You simply haven't edited the jbeam. You should replace everything written in caps to reflect the values you want. Also the Code: "globalSkin": "SKINSAMPLE_YOURNAME", should read Code: "globalSkin": "B-haul", for it to work. Also, in the materials file you have specified that the skin is in .dds format. Make sure it really is, or change the materials file to point to .png. I wouldn't recommend using paint for anything.
There used to be a Penske skin for the Gavril H-series box truck but I cant find it, hopefully this turns out good!
Can you send your files here? I'm sure we can make it work If not me, someone else from the community sure can fix it.