I have a Samsung Directv DVR SIR-S4120R that has two USB 1.1 ports on it. I would like to put a wireless adapter on one of the ports in order to use TivoToGo so I can watch stuff on my iPhone. However, I read on this forum that many DirecTivos disable their USB ports. Does anyone know if the SIR-S4120R has working USB ports that would allow me to move content to my iPhone? Thanks.