This is outdated and doesn't work anymore. GameMaster has replaced OpenSpy and is easier to use. See these thread for more info:
Port Forwarding - http://www.swbfgamers.com/index.php?topic=6383.0
HOSTS Editing - http://www.swbfgamers.com/index.php?topic=7840.0
GameMaster Discussion - http://www.swbfgamers.com/index.php?topic=7827.msg84317
GameMaster Tutorial - http://www.swbfgamers.com/index.php?topic=7842.0
GameMaster Website - http://gameshare.co/gamemaster