No, that's not what was said. DVD players each have their own requirements for the directory structure on JPG discs, and will only enter that mode when that structure exists. I do not think you can have both on a DVD, but you can easily try as soon as you know what the directory structure requirements of your player are.
Some want no directories at all, only JPG files on the disc. Others will navigate a directory, some several levels deep. But my hunch is that as soon as your player sees a VIDEO_TS folder, it's going to play the movie.