Not a bad idea, but there are other programs with such a feature, e.g.:
XnView (freeware) -
Shell Extension - very useful, just right click the image in FC, you'll see the preview and you can also set image as wallpaper.
Another great tool is
HotkeyP, small 103kB freeware! There are following "wallpaper" features in HotkeyP:
Random wallpaper, Next wallpaper, Previous wallpaper
You just have to define path to folder with images and these will be changed every day (or when you start the computer), or also manually by hotkey, or tray icon menu. It's possible also to use it with any scheduler, then wallpaper can be changed also one per hour for example. You can manage the folder with images (in FC of course

). I use this combination - HotkeyP + FC too.
BTW There are also other useful features in HotkeyP, not just "wallpaper" features.