Gentlemen, I'm totally unable to integrate those guys correctly

The correct vehicle should look like that :



If any of you make me a step by step working tutorial he will gain my eternal gratitude (and maybe even a secret screenshot )

The model is correct but the game always choose the wrong vanilla skin.

I've packed and repacked, changed the names and such but can't get it. So please don't post if you have not tried the thing.

Thanks !