MotherVR
I'll be updating this area soon, so that you don't need to read through all of the Release notes to get caught up.
Installation
Drag the dxgi.dll into your Alien: Isolation game folder. To Enable VR, you can do so in Options->MotherVR after the game starts up.
Settings
Done in the in-game Options menu.
Recalibration
You can recalibrate your position and orientation (if you aren't using VR controllers) by pressing LB + RB on a Xbox controller, or by pressing Ctrl + Alt on the keyboard.