I agree with Mad. I don't see anything to be apprehensive or worried about in that link. As I said, you don't have to change anything. All that will happen is that the name of your network will change as will the password. So when your tablet or your desktop looks up available networks, the new one will be listed. All you do is connect by entering the new password. Boom! Done!
And my 100+ year old farmhouse is FAR from normal too! And again, as Mad says... hmmm... who defines normal!