Here’s a super quick and easy way to get a single image HDR in Photoshop CS5.
1. Open your image in Camera Raw (ACR).
2. Set Recovery, Fill Light, Blacks, and Clarity to 100.
3. Adjust exposure and brightness to taste.
4. Readjust any settings that make the image seem over the top.
5. Click Open Image when finished.
The method is super simple and very quick. It works on some images, but doesn’t work on others. You’ll have to experiment to see what works best for your picture.