First get a version of Maxo Vehicle Loader exact or higher than 96e.
http://www.gtagarage.com/mods/show.php?id=16467


Then copy the duke.7z in the vehicles folder.
The mighty and godmode car in vc.Ram everything that stands on your way! :D
Spawn only car! Imagine the angry peds with this monster :).
Have fun!


ermaccer