I must be missing the point somewhere.
Rather then true-widescreen, I quite prefer my 5:4 display on my 15" LCD here, has just the right width/height ratio to it @ 1280x1024 (which is its native rez.)
I can also do the things Indie mentioned in my gfx drivers, but only when I have my monitor hooked up via a DVI cable (which I do). Quite nice for playing old low-rez games and keeping the aspect ratio intact without stretching, but for the most part I cant really notice any difference having it just stretch the screen to the corners on this monitor since it's only just a little wider then the standard 4:3 setup.