The address to type in the browser woud be the IP address of the server, port 980, as discussed in the manual. If you're referring to some kind of text console through your browser, that would be something you added yourself, and I wouldn't know where you put it.
On the third machine (the one that can't see the e-smith box), try going to start\run and entering \.
There have been significant changes to the file/printer sharing code since version 4.1; upgrading to 5.1.2 would probably be a good idea.