Everything other than /S in the commandline will end the app immediately. So there's no Configuration or Preview (/C + /P). The password dialog is done by Windows, isn't it?
The hard part is to make sure the App will find its content. I came away from renaming the exe to scr and copying it to the system folder. Instead I use the Clickteam Installer that allows to install something as the active Screensaver, it will also open the Screensaver settings after the installation.
One problem with a SCR that is copied to the system folder is: Due to some internal windows stuff the SCR app won't know where it was started, so even when its media files are in the system folder too (wich is real messy) it won't find it unless you do a "ChangeDir SystemProperty$("systemdir")" first. Now when you use the Clickteam installer, it will create a Folder in th Programs Folder of the OS, so you can keep the mediafiles there, a much more proper solution. Nevertheless you still need to do a ChangeDir SystemProperty$("appdir") first to allow your screensaver to find it's media files. And the EXE still need to be renamed to .SCR.
The hard part is to make sure the App will find its content. I came away from renaming the exe to scr and copying it to the system folder. Instead I use the Clickteam Installer that allows to install something as the active Screensaver, it will also open the Screensaver settings after the installation.
One problem with a SCR that is copied to the system folder is: Due to some internal windows stuff the SCR app won't know where it was started, so even when its media files are in the system folder too (wich is real messy) it won't find it unless you do a "ChangeDir SystemProperty$("systemdir")" first. Now when you use the Clickteam installer, it will create a Folder in th Programs Folder of the OS, so you can keep the mediafiles there, a much more proper solution. Nevertheless you still need to do a ChangeDir SystemProperty$("appdir") first to allow your screensaver to find it's media files. And the EXE still need to be renamed to .SCR.