Go to <gameDir>\Base, open the config.cfg file with notepad and change the line:
seta r_mode "-1"
Add the lines:
seta r_customwidth "1920"
seta r_customheight "1200"
(or your resolution of course)
And Now:
Bop on over to the FOV calculator:
http://www.widescreengamingforum.com/fovcalc.php
Alice's default FOV says "0", but it's actually 90.
Now here's the problem: you can't set the FOV in the .ini file.
In fact, if you try to set it that way, the game will lock out your ability to adjust it from the console.
Go up to the bindings, pick your favorite key, and bind your new FOV.
If you have a 16x10 panel like I do:
bind M "fov 100.39"
Now run the game. After every save game and level load, hit your bound key. (Yes, it stinks, but it beats Vert-).