I've got several MPEG files that play back just fine under Windows Media Player but when I try to open them in Windows Media Encoder I get<BR><BR>"The file <foo> is not an acceptable media file. It ...

I've got about 300 computers, and I am trying to find the best way to get an MPEG2 codec installed, as well as providing codecs for other likely video formats. I work in a library (these computers are ...