Hi there.
The led kit is only for 1 type of coaster. You can attach any 3D object to your trains using a simple script.
I can help you with that if you need. Its pritty simple.
And about the car texture you asked in another topic:
There are no ready-tu-use textures for coaster in NoLimits. You can creat your own using photoshop and stuff...
Again, i can help you with that.