I know I posted about this once before, but (cheers to @CMM for letting me know this) it has been updated.
It now works in SteamVR using revive injection. Just tested it on 1.1.92, and it works very well. Much, much easier to get it working than before. Also has a lot more control options.
Here is the update:
http://www.malcolm-s.net/q2vr/
I use 1.1.92, and the latest revive. Tried patching in revive, didn’t work, injection does. Enjoy.