You can't do this by default. You could quite easily make it though, the toughest part would be the GUI. You would either edit the default (which usually looks horrible and potentially breaks other mods) or have an ugly way of doing it.
You might be able to do it with events. I think there's an setVehicleTransform event which might allow you to rotate it 45 degrees, otherwise i'm not too sure. But combined with onVehicleSpawn from Vehicle Events and you should be good.
