could someone tell me how? i can get to right page and port forwarding screen, but from there im lost. couldnt find any useful info on net. thanks

you try this yet ?
http://portforward.com/english/routers/port_forwarding/routerindex.htm
just look up your router model.

also you have a lot of info in your computer already.
if you installed to the default directory, copy and paste this link in your browser

C:\Program Files (x86)\Electronic Arts\Crytek\Crysis 2\Support\EA Help\en-us\Online_Connectivity_and_Performance\Start_Online_Connectivity_and_Performance.htm