Noticed your other thread about you asking for some feedback on your photos. If your going to do HDR that's the noob'st thing you can posibly do for car photography.
Lambo472, HDR on photoshop is a little tricky IMO, there are programs like Photomatix that are pretty user-friendly when it comes to HDR. I agree for the most part. Most people just do full blown HDR on photos just because they think HDR is cool or something. I have seen a few auomotive shots that worked well with HDR, but it was subtle.