it's pretty tricky to get the audio and/or video from .wmv files and convert them to something else.. all thanks to microsoft.
ppl have recommended using a program called GraphEdit to do this, which is found at
www.doom9.org. the guides for converting .wmv files have been taken down at doom9, so ur best chance would be to type something like "GraphEdit wmv" in search engines, and to experiement with GraphEdit. a little more info on this program can be found at the doom9 forum.. i just PM'd a user on this forum named Mechaman, who seems to know someting about GraphEdit and extracting .wmv files from
this thread.
meanwhile, i'll keep trying it out in GraphEdit..