If you're after the basic (free) version, you can get it here
http://www.limewire.com/english/content/download.shtml
If you want to update Pro, use your personal download page or go here
http://sales.limewire.com/support/pro_lookup.php

Lots of info here about how to burn a CD
http://www.gnutellaforums.com/showthread.php?t=27006