I don’t know why I never tried it before, but it actually works! And it’ll even spawn out to a window two. Although without share/record locking it’ll end up being a world of pain, I suspect. Maybe vDOS/vDosPlus will work? I know it’ll work fine if you boot MS-DOS inside of DOSBox, but for some reason I never actually tried to stress the v86 mode of DOSBox from within Windows.