if you give the 'whats the exact model you have now, url to the pdf incase its needed later' and a link to the PDF manual then we can tell you the url to use
http://192.168.0.1 or
http://10.0.0.1 for instance,it will be written in the manual somewere.
the Fn key will be assigned to an app somewere on your drive, there will also be that 3rd party wireless app as well probably, it seems your using the xp stuff right now, but seeing as yousaid its now connecting then when you find the right url, you will find that the laptop mac etc is in the web entrys somewere, iv just skimed your posts as im busy right now but ir seems your problem is now in the router settings, go find that url and post all the info (for other to learn later) and we can type you through it if needs be.