Here is a good video of all these cars fighting it out on the track. I like how they show the heel n toe action of these drivers. The boxster was a 2.7L 217 hp model not the S as it says in one screen. It didn't fare so well against the competition, I don't know why they didn't use the S model considering what it was up against.
http://www.youtube.com/watch?v=ozvR3UFbkLA
Enjoy