While I was searching the Internet, looking for some new screen savers, I came across this site that you might want to check out. It's called Padtube and they offer free Civil War screen savers.
Each Civil War image can be set as desktop wallpaper and the utility will cycle your wallpaper every day or every hour. The Civil War screen saver is powered by a first-rate screen saver engine that lets you set the duration between images, see images full-screen or at original size.
I really like this one that I can control. I'm glad I found this. I get tired of the same things over and over again. Oh, they do have some other offers you might be interested in.