The only tuts I really know of are marks - here:

http://www.vtc.com/products/Carrara-5-tutorials.htm

There is a section on lights - but I dont know if it covers hdri - if you go to his site:

http://www.markbremmer.com/pages/TutMain.html

And look on the right hand side there is a section about the dark arts - there is a car in the picture and I know he covers some of that in that tutorial but I don't know if its lighting per say.  It was way too advanced for me so I didn't watch the whole way through :/

Good luck finding what you need!

I am:  aka Velocity3d