There isn't an upgrade for MovieMaker itself but you can publish your
timeline from MovieMaker to a file which you can then use with a separate
DVD video authoring package.
Some DVD video packages will work with a Windows Media (WMV) file but
another approach that works for a bunch of people is to publish your
timeline to a DV-AVI file. When you're on the Movie Settings page choose
"Other Settings" and select DV-AVI from the list (if Other Settings isn't
visible then click "Show more choices..."). Once you have the published
video file import it into your DVD Video Burning software package of choice
and go from there.
Hope this helps
Dean Rowe
This posting is provided "as is" with no warranties, and confers no rights.