Only at the scam sites. I bet your friend only has the free version & it's not really the pro version (either that or it's a variation of LW such as eTomi which is sold by scam sites.) To find out if it's the pro version you go to the help menu & select about limewire... & that will tell you the version of LW it is. Check this list out to see which scam site your friend got it from:
http://www.gnutellaforums.com/showth...879#post119879
The official LW site is here:
http://www.limewire.com/english/content/download.shtml