Change default FOV automatically

So I'm completely stumped on this. Is there any way at all to set up Eternity so that I don't have to change the FOV via console command every time I boot it up?

You can set up a bash script that will run the FOV console command upon launch.

Could I please get an example of how to format that?

I apologize, I got the console and command line arguments messed up. I'm unsure fully how to.

You can specify up to two console scripts to load at startup in the config file. Create a text file with the text "r_fov 120" (without the quotes, and with the number being whatever FOV you want to use) and save it in the Eternity directory. Then in user\doom\eternity.cfg find the key "cscript_1" and change its value to whatever you named the file. Then Eternity should run the script whenever you launch the game. You can also use the -exec parameter on the command-line to specify a script to run at startup.

Thank you very much, that was exactly the information I needed.