I think the option to allow the end user to have an enhanced wallpaper support feature would be a very welcome feature to the Screensaver Factory software.
Maybe a tab that would allow the end user to see thumbs of the wallpapers they can choose from and then be able to set it as their wallpaper with some other options such as full screen / stretch / tile, etc.
Embedding a logo into it would be helpful to help slow down others stealing the images for their own use.
I just don't think a hidden feature of pressing F2 is a good enough wallpaper feature to have in the end screensavers.
Watcha think?