Those are the setting changes to make, applying to all models of router.
You'll need your owners manual to locate items within the router setup menus. There are settings that have to match the computer and the router. If you change one (router) and not the other (computer), you cannot make the connection. ** Network name and encryption have to match.**
If you limit the initial changes to item #2, #4, and #6 in the howto, you shouldn't loose connection. Those changes are in the router setup only. They do not effect your computer settings at all. It limits connection. At this point they would have to imitate your hardware to get access.
If you are comfortable with changing the network name, #3, do that. When you change it in the router, the computer will loose connection. The computer will have to locate and reconnect to the network. You may have to type it in if broadcasting is off (#4). Follow it with item #4 then #6. Be sure to use your wireless mac address and the mac address for the wire network card too for item #6!. You should see them in the router log if you have connected with the cable and wireless, and the log is on.
#3 - Choose a network name similar to the rules for password. Use a cap, lower, num, and special character if it will allow. You can see the name in the router if you connect with the cable and still not broadcast it. Handy when you miss a character or forget.
That's a pretty good start.