I tried all of the solutions above and none of them worked for me. If your having trouble getting this achievement, do what I did. Set "The Prayer" by Bloc Party as the only song in your playlist. Then set up a Custom Race on any track, 1 lap, and 2 computer opponents. It`s very important you have 2 opponents because you can`t just let one car win, you have to finish ahead of someone too. Now, give one AI driver a class "A" car, give the other AI driver a very slow class "E" car, then give yourself a car fast enough (class "A" for example) to stay ahead of the class "E" car. Now, just stay behind the AI driver in the fast car, and ahead of the AI driver in the slow "E" class car and you should get it. It worked for me, let me know how it worked out for you. Good luck.