This is a labled template for making a player van skin (This replaces the second van texture aka the blue one)

Make sure you have software to edit the .DDS images i recormend paint.net

how to edit the .DDS image
step: 0: make sure to extract the .zip file in your mod_overrides folder
step 1: open the .dds file in gimp or paintnet
step 2: Add the things you want to put on the van make sure its in the dark blue area also you can change the wheels
step 3: save the image as a .DDS image in the same folder (Make sure to overide the prexitsing .DDS file)
step 4: change the file type to .texture by renameing it (make sure in windows in the view tab of file explorer the "File name extensions" box is ticked)
step 5: launch PAYDAY 2 with this mod in the mod overides folder under the assets folder
step 6: enjoy the mod or publish it on modworkshop and also make sure to delete the .txt file in the main folder

I used the pac man van mod as a base and removed the pac man stuff and turned it into a template

Pac man van: https://modworkshop.net/mod/27293#description