Desktop Settings Control Panel
Launch an executable with a .scr extension by calling the InstallScreenSaver function.
rundll32.exe desk.cpl,InstallScreenSaver C:\temp\file.scr
Launch a remote executable with a .scr extension, located on an SMB share, by calling the InstallScreenSaver function.
rundll32.exe desk.cpl,InstallScreenSaver \\127.0.0.1\c$\temp\file.scr