Lite-C Workshop #19 and "Knights on Wheels"

"Knights on Wheels" uses terrain and Lite-C Workshop #19 uses WED level. How do I modify "Knights on Wheels" code so that it uses WED level instead of terrain? I tried to modify "Knights on Wheels" code to use level_loadendless instead of level_loadsplash but the car falls off the terrain tile next to the center terrain tile. Please see the thread at http://www.opserver.de/ubb7/ubbthreads.php?ubb=showflat&Number=335829#Post335829

you need to set the car at the other side of the level, so the illusion and the collision will work.
the level isn't endless, it only seems so!