First off, the original ep size was 320x200, current size is 640x400.
If that isn't enough to kill the idea, the method seems to be rip the DRM out of the MP4 and save it as a WMV, either directly to the DVD or as an intermediate format to DVD format.
The DRM ripper seems to be tunebite, as per the following:
http://www.freedvdripper.net/guides/burn-itunes-rentals-movie-to-dvd.html
http://www.dvd-tool.com/burn-itunes-video-to-dvd.html
A poor man's tunebite, shows using nero to up-convert the WMV file:
http://www.wmatomp3-converter.com/guide/itunes-movie-video-to-dvd.html
A forum threat that had some good and usual not so good hints:
http://techrepublic.com.com/5208-6230-0.html?forumID=101&threadID=233218&start=0
A humorous essay on the history of iTunes video et al:
http://www.roughlydrafted.com/RD/RDM.Tech.Q1.07/D1925D1E-7479-4F44-B3B7-472113B366D8.html
