The covered Desoto is not LucasArts property. Steve Purcell chose to make it convertible for the Telltale games. Notice how his art for the T-shirt and the CGW cover also sports the redesign of the car.
Telltale probably had some say-so in the Desoto's new look too, but I don't think it's because they legally had to make it different.
Last edited by Udvarnoky; 04/04/2007 at 09:19 am.