For this track (in Obstacles) you need new objects (in pipeObstacles)
but you also need the new objects_static.mat file because it uses the gas_tank material i added here:
so you also need the textures named gas_tank and gas_tank_norm from here
http://platen-software.de/sebastian/SR-objects.tar.gz
edit: i added image later, i forgot to add this in track