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If Movie Maker will open the file, use the following instructions to
save as .avi.
To save as an .avi movie file...
Type...Ctrl+P to open the Save Movie Wizard / Choose...My Computer /
Next / Enter a Name and a Save Location / Next /
Show More Choices / Other Settings / Open the drop window and
choose...DV-AVI / Next / Wait while the movie is saved / Finish...
If Movie Maker will not open the MPEG file...read the following
article for alternatives.
Movie Maker 2 - Importing MPEG Files
http://www.papajohn.org/MM2-Importing-Video-MPEG2.html