I removed the images from the skin package as I didn't create them and I didn't want to give the impression that I did. You can find some very nice images at http://creativemyk.com. That is where I got the images originally included in the skin package.
If you want to use an image for the background:
- Remove the <!-- --> comment tags from around the "<img id=background-img..." tag
- Replace the src with the path to your image.
The image will scale to the size of the browser window.
If you want to change the color of the background, modify the background-color of the #wrapwebsite selector in the Style.CSS.
Also, you may want to download the last version of the skin using the link in my first post.