Brian,
Screen Savers need the extension "scr" in order to work properly. In addition to the other advice, simply compile your application and change the extension. You will, however, need to change the screen saver after the product has been installed in order to make it work. I've a class, "Disable/Enable Screen Saver", in the download section that will give you a start. It does require some knowledge of the Windows API.
George
Ubi caritas et amor, deus ibi est