The tutorial is for only one router because that's the router Badspot probably had at the time he made it. He doesn't have time to make a tutorial for every brand of router. That's why he says things like "If you don't have a status tab, just click around until you see something that looks like the next step". Look around until you see something like what it shows, and use some logic to put the right things in the right boxes. It's not rocket science.
