I am wanting to add a router to my personal computer so that the kids can do the online gaming(x-box) and we can add another computer later. I understand how router work. I am wondering about wireless routers. All of the computers will be desktops. Will I have to add a wireless card for the wireless router to work? Is there something that will plug into the device that I want to use the wireless router on, i.e. X-box or PS2? I would like to get this done for them, and the kids in me.