Follow This Video. After That...
Open Rooms for Fifa 07
After this type your name in machine name and go to network than.
After going to network Initiate or join a game. Note if you have joined a certain room you should wait for host to initiate and if you are host you should initiate. ( You can initiate in others room but still I recomend you to wait for host to initiate).
Than its simple choose team and play.
Play the Easier way using GameRanger.