Good news, everyone! I figured out how to make screen savers (for Windows, at least).
You can just sit here and watch all these Twilights in your browser, or you can have them show up on your computer screen whenever you stop doing anything for too long! All you have to do is download and run this file: [link]
and then the screensaver will be installed on your computer. You might still have to set it as your screensaver of choice through the control panel, though.
So, if someone else would be willing to try this, I'd really like to know if it works on other people's computers.