Here is the setup I use to shot pictures below:
The main purpose, is to get an even lighting to the subject. Although the end result is not 100% perfect direct from camera. But with such setup, it reduce your time spend in front of your computer for editing. Instead, you can spend more time to take better quality photos.
To get a pure white or black background, I used Capture NX with technique I describe before http://images.chewhow.multiply.com/a...?nmid=94425019