One of you has to be the server so you will need to know the IP address. In win98, go to Start, Run and type in winipcfg. This will give you your IP address. You said you were running on a T3 so this address should never change.
Like I said one of you has to be the server, so there should be a command to Create Game under the multiplayer settings. For internet play, you would want to create a TCP/IP game. Once running, the other person should Join Game and enter the IP address of the server.
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