you may still find that by tweaking it slightly from default, rather than dramatically you like it better; I would open halo 2 go to offline mode, create a multi player lobby, start the match and toggle the Cartographer menu with "Home" then play with FOV and offset in real time until they are to your liking : P
you can also toggle the values manually via the halo2config1.ini in
C:\Users\%username%\AppData\Local\Microsoft\Halo 2\
make sure that if you do it the manual way that you edit the config and save it before opening Halo 2 to see the changes propagate correctly : )