While TrackMania didn't have a wide release nor have high production values, it did spark a bit of a cult following due to its fun and addictive gameplay. TrackMania is a game in which you can build tracks and race on them. What makes it so addictive is that its track editor is very simplistic and easy to use, allowing one to pick up and build. Then you can take your tracks online, and see how fast your opponents can beat it.
This is my TrackMania United Forever Carpark Vette, and yes it works in nations as well. This can not be found at www.trackmania-carpark.com this is a moddb.com exclusive skin. place unopened zip file in: My Documents/Trackmania/Skins/Vehicles/CarCommon if you have Vista then place in Documents/Trackmania/Skins/Vehicles/CarCommon if you have Nations Forever then place in the same place as above except put it in your "StadiumCar" folder instead.