Heyy. im new to thiss.. so sorry if im Not good
Okay, Your basically saying you wanna open a port?
go to : 192.168.0.1
And this is where your Stuck , right?
The username is : Admin
And the Pass is : changeme
then you will have the option to change it..

Congrats You got into it..
Now to open a port...
Scroll Down to Advanced (this is For Virgin, thats what i got)
then press Portforwarding.. Type in the Ports and Protocols..
Press Apply!

Woo, You got it half open ....
Now you need to open it fully..
Now go to Portblocking; Type user and pass again. (if you get it option to.)
Then type the Port and protocols again..
Weeheyy!


NOTE : THIS BIT IS FOR PEOPLE WHO MAKE HTTP GAMES.. ETC; HABBO AND RSPS
Now For people to Join.. For example Habboo, Runescape.. that sort of thing ,, Or any HTTP Games..
You wanna go to Port Triggering. And type them in Twicee.. Or how many you have to put in..
WHOOO!!!

Congrats you Portforwarded...
P.S .. Hope thiss Helps!