Hi,
A long time ago when there was the retro competition I remade Wacky Wheels (Mario Kart), anyway I never released the source so here is how to get it:
http://www.levelmaker3d.co.uk/krazykarts/
All of the source and media is copyright to me (John Youren), however your free to use them
providing you give me credit.
If your stuck on using Level Maker 3D files then it will show you how to load them.
Have fun!
Level Maker 3D: www.levelmaker3d.co.uk/levelmaker3D.asp
DarkBasic Professional Editor: www.levelmaker3d.co.uk/ide.asp
also: www.levelmaker3d.co.uk/KrazyKarts/ & www.DigitalOmega.Net