I can't seem to find where the in the settings files the resolution settings are stored. I'm trying to set it to something other than the options provided in the dropdown menu.

Somewhat related question, is it possible to have a "fullscreened windowed mode"? Like, have it in windowed mode but remove the border and have the game go over the taskbar. I know it's possible to do this in several games, and with a game as heavily moddable as Fallout I'd be surprised if this wasn't possible.

All the settings for the game are stored in My Documents>My Games>FalloutNV
There are 2 files in there called Fallout and FalloutPrefs

Open the file labeled FalloutPrefs and use the find function to look for iSize. This, and the value underneath it are the resolution.

Thanks. Is there any way to play the game in "full screen windowed mode" as described in my first post? I seem to recall being able to do this in Fallout 3...

Bump

What exactly is Fullscreend Windowed Mode?

try here
http://www.newvegasnexus.com/downloads/file.php?id=35817