Need help with custom vehicle



I would like to use this :

I try so many things but nothing work :
First : If I create stream folder with dowloaded file and add vehicle.meta ( the game crash when vehicle spawn

Second : I use the same file but I rename mule5 (to create a neww vehicle), The vehicle spawned but they haven’t livery (they have first livery image)

So how to use this on my server?

Thx you

P.S: Sry for my english, I’m a french people