I need to make sure my WinXP computer's WAN IP stays the same and is never taken. It has been taken twice by a Win2K computer and is a bit of a headache to get back. How can I configure my DSL ...

Have my main computer (Win7) computer in basement, along with the cable-modem, Netgear N900/WNDR4500. Both my main computer and an older WinXP computer are CAT6 wired to the N900. So are my DirecTV ...