1. Configuer your firewall to allow LW full access:
http://www.limewire.com/english/content/firewalls.shtml 2. How to forward a port on your modem/router depends on brand & model. For a guide you can check here:
http://portforward.com/routers.htm
I don't know what an SMC router is. lol
3. IF you need to manually forward a port on your modem-router (remember you MUST have a Static ip for that to work!), then within LW do this:
Manual port forward instructions & sample image & 2 posts after that.
Hope this helps!