Have a wired router-no wireless capability for all current hookups PC, tv etc... PC is hooked directly from the wired router to the PC. The other devices are hooked up through a switch box thats fed with a single ethernet cable from the wired router. Can a wireless router be added at this switch box? If so, how? Want to be able to leave all the ethernet wired connections and use the wireless router at the same time. Thank you.