It would be nice if someone made a new Moonhawk Sedan the police skins make no sense on the 2 door version
The zip file with the hotfix doesn't work anymore unless you remove the Lua folder contained into it. When you are in your mods folder, unzip the mod, delete the zipped version, go to the unzipped one, remove the lua folder. Rezip the folder. The structure of the zip must be modsname.zip/vehicles/modsname/content. If you don't know how to rezip it properly, create a folder in mods called "unpacked" and drop the unzipped folder into it. There is also a function in game to unpack and repack a mod, i've never used it but it could be a better way for beginners.
You can also drag contents of .zip into Documents/beamng.drive/ That automatically puts it into documents/vehicles/modsname which is same path as in zip and also same path which game content uses (despite they residing in steamlibrary) and saves one step of creating unpacked folder.