I have setup Steam to launch the games in the following way...
- Add the game to your Steam library (On the Steam top toolbar go to Games/Add a non-Steam game to my library. Search for or browse to your VPVR.exe)
- Add the following line to the 'Set Launch Options'.... Example is for No Good Gophers.. You have to change this for each table entry (to match the table name)...
-minimized /exit /play "C:\Visual Pinball\Tables\VR ROOM No Good Gofers (Williams 1997) V10.vpx"
They launch successfully from the Steam menu this way, and the escape key pulls you out of VP. I haven't actually tried loading them through a Virtual desktop or VR Home in VR this way, but I'm guessing it would work the same.
It would be great if we had some sort of an official frontend. Maybe somebody smart could modify PinballY frontend to work with VR.