Hi, when I try to import a .mpg file i get this message Do you know what codec they're talking about?
Download Gspot, and load that mpeg into it. It will tell you what codec is needed, and whether or not you have it on your computer. http://www.headbands.com/gspot/download.html
I don't think Gspot can handle mpeg-files. AFAIK Windows Moviemaker also does not support mpeg-files.