You have a lot of work in front of you:
Download the LW 4.1.5 beta @
www.limewire.com/english/content/beta.shtml
Open your Windows firewall on port 6346
Do port forwarding on your router as stated here:
http://www.gnutellaforums.com/showth...threadid=25119
Apply the patch to get more simultaneous incomming connections on SP2 (they were limited to 10)
http://www.lvllord.de/4226fix/4226fix.htm
see the gnutellaforums about SP2 here
http://www.gnutellaforums.com/showth...threadid=27403
Bonne chance