As its just dumping a .scr file in the Windows directory, it would be dead easy to create your own setup via Inno Setup. http://www.innosetup.com/isinfo.php
I also would like to know if there's a way to make a silent installer for bundling our screensaver within other's installers, private labeling our screensavers, other reasons, etc.
Since SSF has the built-in capability to make it's own installer, it'd be nice to know how to pass a parameter to make it silent installing, or add a feature to do that in the next version.
At the present time the built-in installer generator is very simple, so if you need more features, you will have to use a third party setup generator with your SCR file.