When you set up the router initially on the desktop using the AOL set-up cd, did you set up the wireless? You have an option not to.If you did you'll have named your network (ssid) and have your network key.
On the laptop you do not need the AOL set-up disk. Just go to start--connect to--setup a connection or network (small blue typing)--manually connect to a wireless network--next tab--then fill in your network name (ssid)--security type (wep or etc.) and then fill in your security key.