yeah I know.. old games = bad fov.

but what if you check the console key? (standard is ^ in the left corner of your keyboard)
now you have to type gfx_WidescreenFOV # inside the console.

the # stands for the field of view range.
replacing it with 90 means that you get an perfectly fine fov of 90 in Far Cry 2.

this should work first time, so if it's not working that means you doing something wrong.

hope I could help out with this.
have fun!