http://ecomodder.com/forum/showthrea...ies-21204.html
The Coventry University work on base plates suggests you can get some/much/not all the benefit of a boat tail with a stack of diminishing, deployable plates.
The last one can carry a license plate and flat LED arrays. Or even strip lights on the sides of each plate.
Edit: Oops, looks like the links eventually all went 404 in 2013. Here's a consolation prize:
