Basically, my family and I are leaving for a family vacation tomorrow and we are planning on hooking up a portable dvd player(which has the red yellow and white inputs) to our van with its 12 volt cigarette adapter, but we also wanna hook up our gamecube and the problem is we need some cable or something to plug the power cable from the gamecube into our vans other 12 volt adapter. Does anyone know what kind of adapter we would need and how much it would cost?