Thank you kindly for the clarification. I was thinking about installing DD-WRT on this router and giving it my brother who is not very network savvy. He currently has his Xbox connected to a wireless router through an ethernet cable and has to use a wireless adapter on his PC in the other room. He can not connect his xbox wirelessly. i suggested he run an Ethernet cable through the basement and up to his PC but that's not feasible. He is currently having issues with his keeping a good connection with his wireless adapter and is constantly unplugging the adapter to reset the internet connection.
I'm sure that if he connected this Linksys router to his PC and setup the MAC address ect, it would offer a more reliable connection and he would not need a wireless adapter anymore. The question is does the Netgear router attached to the Xbox have to be connected to his PC for him to add the MAC address of the Linksys, or can the Linksys be connected right to his PC so he can add the SSID and password from there? Would it be easier to have the wireless router, or the Linksys connected to the Xbox?
He can log into the Netgear router from his PC wirelessly, so does he simply have to add the MAC address of the Linksys into the Netgear before removing his wireless adapter? then once the Linksys is plugged into his PC Ethernet port, can he log into it and add his router's SSID and password?