I,ve put a wall across the track. Raised it up in the shape change section and used two poles at each end to make it look like a banner. I never changed the texture, but if I had it would have looked like a banner I'm sure.
Yup. It's rock steady. I made a small tut for adding objects from Sketchup into BTB, and I used a Finish Line banner. It works real well, except that the colors are a little bright. Hopefully I can find a way to put textures onto the models then the banners won't look so clean.