I think you may have come to the wrong forum I have never even heard of mactella until now.
Come to think of it how did you find this forum atall!!
This link should help (you would be wise to install iTunes first if you don't have it)
http://www.gnutellaforums.com/showth...threadid=36230
If you have more questions I should break to forum rules and start a new thread in One of the Limewire Forums like Open Discussion