In a future AR code, is there a way that you can include the course hazards from single-player mode, but not bringing the active background environment and NPCs so that it can run well in three modes of Multi-player Grand Prix, Versus, and LAN Mode?

So I know there's a code that loads the single player version of a course in multiplayer mode, would it be possible to combine that with the code that allows Grand Prix multiplayer? I ask this because certain courses crash upon rendering. If you can create a code merges "Play-Single Player cour...