I have 2 laptops and one is wireless and the one I am using is not wireless. I heard that I need a broadband router to go wireless. On the modem there is green light with the words wireless by it. My other laptop is wireless so would I still need a broadband router to go wireless or does my modem have a built in broadband router? My modem is a at&t 2wire dsl modem. How would find out what type of wireless usb card I need to buy to go wireless on my laptop.