Can't speak out of experience on your specific bike, but it looks like it would just screw in. However I'm pretty sure you'd have to take off the tire to install it anyway, so worrying about that if you don't have the skills or tools to remove it isn't really wortwhile (Maybe you do, it's just not typical).
This reminds me that I still have to permanently patch my rear tire...sigh. And assembling my tire changing machine simply for a patch (or something like a damaged valve stem for that matter - I've been there) is a real pain. Oh well. Normally broken valve stems are a quick and easy fix so don't sweat it.