great thats the same model I have, the instuctions on Port forward are pretty good for it. What I like about this one is that you wont need your IP address but instead it set up by your Computer name.
If your not sure which computer on the network is yours (by name) you can find the full name at Control Panel > System Icon > Computer Name. Make a note of that.
Next information that your going to need is the Gateway IP that we need to contact the router configuration pages. This may depend on the firmware installed from your Internet provider so its best if we just make sure what that is first.
Go to Start > Run > type in cmd
Then click OK
Now in the black Box that appears type in ipconfig
Then hit Enter key.
You should now see your Default Gateway Address, write this down.
From here you should be able to follow the directions from here:
http://portforward.com/english/routers/port_forwarding/2wire/2700HG-B/WinMX.htmIf you have any questions about this or problems just post back here Crownprince