You probably need to find out what port's are used by SC to connect other computers, and then find out your internal ip address.
Then you access your routers configuration, and go to the Port Forwarding Table, and tell your router to forward all communications along the port(s) used by SC to your internal IP address.
Then you find out the external IP address for the router, and use that one with your opponent.
And your set. You may need to refer to your routers documention or online resources to figure it out for your particular configuration, but with Linksys products, it's fairly straightforward.
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LW
 
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