Prepare the DVD in DVD-Architect, making sure you leave enough space for the extra content. Use a 3rd-party DVD burning application (such as NERO) to burn the AUDIO_TS, VIDEO_TS, and your extra content directories to a blank DVD. I usually name the extra directory EXTRA and put everything in there. Most DVD players will ignore an autorun.inf file in the root directory, but if you want to be extremely careful about making sure your discs play in as many players as possible you might want to avoid it.