Aaaaand you gotta run Vulcan. It's Standard for 4.5 but still.VR is Live. You just have to have the headset on and running before launching SC to see the settings. / on the numberpad toggles it
Got me 2 User.cfg files with VR / Non-VR setting. I simply switch them as needed.
Also get a hotkey for VR re-center you can find blindly. Because you'll need it...

Also get a good, stable seat because VR will knock your socks off!