I didn't want to mess around with ac too much yet so I don't have to change everything back for tomorrow night
Make copies of the video.ini config file in My Documents/Assetto Corsa/cfg which has all the graphics settings. I have one for VR and one for triples and just switch them out to what I need. I use the app presets in game for triples vs VR, but it does screw up all the positions of the apps I use for triples when loading via VR due to the resolution, so that for you can make a copy acos.ini file that's in the same directory as video.ini