XML wallpaper support
First, great little program. Thanks for taking the time to write it for us.
Second, consider adding support for .xml-style wallpapers. The usage file makes no mention of these types of wallpapers so I didn't attempt it (perhaps falsely assuming that it would crash the app). You are probably familiar with these, but if not - they allow a user to simulate animated wallpapers by providing a list of images and display durations in an .xml file. When the 'filename.xml' comes up in the wallpaper list, the list gets loaded and displayed in relatively rapid succession, like viewing an animated .gif.