You can only get so far with the viewmodel FOV, but that’s basically all that can be done. Since these games were designed to look good on a monitor, weapons aren’t rendered with world scale/fov. Not all, but many first person games do this.
What was added to F.E.A.R. 2 was DirectVR FOV, F.E.A.R. 1 already has that. Head tracking is mouse based in both games.
If you’re not bothered by a bit of letterboxing, you can make it a little better with a balanced combination of:
a. zooming the screen out a fair distance (things become smaller)
b. decreasing FOV to compensate (to maintain world scale)
c. re-adjusting 3D strength to your preferred balance of depth vs scale
(increasing makes things smaller but pop more, decreasing makes things bigger but lose some depth)
Also, don’t forget to use the “main eye” option for games that use iron sights. It greatly helps aiming with your preferred eye. Enable expert settings in vorpX Config for access in game.