I have an ADSL modem plugged into a Corega Broadband Access Router BAR SW-4P Pro. From that router run Ethernet cables to two computers, a printer and a photcopier. Would it be possible to unplug the 2 computers (leaving the printers attached to the router via Ethernet) and instead run one Ethernet from the router to an Airport Express and run the computers wirelessly from that? (I don't want to buy and lay USB cables if I have the Ethernet cables there already.) I'm an idiot when it comes to hardware, so feel free to treat me as such.