For your Linksys setup menu, you have to open your web browser and go to
http://198.168.1.1
This is where you'll setup your password, and access restrictions. Since I don't even have a wireless laptop, I have the wireless portion of my 802.11g turned off. The only reason I bought a wireless was for when I did get a laptop, but a needed a router at the time.
Because that IP Address is the same for all Lynksys routers, it's in your best interest to turn off remote management, and set up a password and user name.