You could get GSpot from here.. www.headbands.com/gspot/

When you open the file with GSpot, it will tell you what codec you need to play it, then you could google for the codec and install that.

Alternatively, you could try Videolan, it comes with all the codecs you need

www.videolan.org/vlc/

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~Kath~
Always judge a person by the way they treat someone who can be of no possible use to them