If this folder does not exist, create it.
(Typical path on Windows 7 is Documents\ManiaPlanet\Skins\Models\StadiumCar). It should be in your Documents folder under 'ManiaPlanet' then in Skins, then Models.
It's actually much easier than it seems, so here we go! After lots of looking on how to get this going appropriately I decided to post a quick how-to on getting a custom 3D car model going in TM2 Stadium.
