Do you mean .wmv? If so, you can view those by installing Flip4Mac, which add the WMV codecs into QuickTime (and therefore all apps that run on top of QuickTime, including iMovie, too).
thx
Now i can watch them. But i still can't open them in imovie, probably i have to buy and download an upgrade. I'm using this as a one time thing to help my father in law, so don't want to spent to much money on it.
dirk