From within Netscape, click on preferences in the edit menu.
Click on the "Mail Servers" sub-heading under the "Mail and Newsgroups" section. In the outgoing server field type "mail.fire2wire.com" and in the outgoing user name field put your user name. Next click on the "add" button.
The server name is "mail.fire2wire.com" and the server type is "POP". Type your user name in the user name field, it is the same as for your dial up account.
Next, click on Identity in the left panel, then type your e-mail address in the second field. The rest of the fields are optional, so you don't need to fill them out. Just click "ok" a few times and you're done.