I looked in my old photo albums, but couldn't find any pics, but I'll try to describe it to the best of my memory...
When you entered the queue, there were a few full-sized (I believe) NASCAR-sized racecars placed alongside the queue route. There were speakers playing racing sound effects as you walked through. When you got into the queues under the shelter, there were big screens that played a pre-show featuring Kyle Petty. It was in surround sound, and there was another car either suspended or on a platform in between the two sets of queues (again, the best of my memory). There were tons of theming. It was actually pretty exciting. For a time, there was a souvenir stand when you left the queues. I bought a hat from it after my first visit to DoT.