I don't know the ports for the game but since you said you have got the information I will assist in placing it in the router.
Port-range there is 2 slots. You can either enter the same number in both to only open one port or you can place two different numbers in to open multiple ports example: 1024 & 1027 opens ports 1024-1027.
In translate to you want to enter the ip address of the computer hosting the server.
After that is done you will want to make sure that the ports are also open in windows firewall. Which can only be done with windows firewall with advanced features/settings (exact name eludes me atm.) The will need to be an incoming connection.
Need anything else let me know.