This is the address to change the FoV.
To use it in cheat engine, attach it to iw6mp64_ship.exe and click "Add Addresses Manually". Click on "Add Offset", fill the correct info, Change type to Float and click "Ok".
You should see "65" as value. Change it to desired value and freeze it. If you don't freeze it (X in box) the value will come back to 65.