As an /f/ regular, I can tell you that it's quite simple. Grab the program SWF Opener. It has an option to display at the native size (no scale).
http://www.unhsolutions.net/downloads1.html near the bottom of the page.
No more jagged edges. While I'm at it here's a few other pointers. To save flash from /f/, just right click on the darn link you click on to open it. It's amazing how many people don't know that. The File > Save As was already mentioned. And to save from a webpage where it's "embedded" use the Firefox extension called UnPlug. It works great for adult flash game sites. The only ones it can't save are like the Yakyu game, where it calls on different files from within the flash.
Oh, one last note. The game is already on /rs/, v.10.25 it says.
