This is one of my tools I use almost daily... It ia small quick and simple. I can produce the whole website in a image file from the URL. Not a desktop screen shot.
here is a example. As you can see it takes the whole site and makes a gif or jpg so you can work with it. Grate for template sales... and its Free like Beer.
Web Thumbnailer is a free utility to create graphical snapshot of web pages. It takes a list of URLs as its input and save its output as JPEG or Bitmap images. It has four snapshot types: 1024 x 768, 800 x 600, 1024 width with full-content height, and 800 width with full-content height. It has ability to down-sample images to a specific size. It has also an auto file naming and auto-number prefix features.
DOWNLOAD IT HERE