i found a guide for making an anamorphic dvd, as no programs seem to work quite right with it. One thing though after reading it suggests that the ifo files house the aspect ratio, while i was under the impression that there was a flag in the mpg that did it. Anyways here is the link for the guide, tell me if you feel it will work or not. I plan on using DVD Workshop instead of spruceup.

http://www.ghorne.pwp.blueyonder.co.uk/vidtest/169dvd.htm