I live in an apartment building and recently got direct TV. I share an industrial dish and only have one cable coming out of my wall. This set up was fine for the regular cable box but, I bought the HD DVR and can only receive signals from odd number transponders. I need a multi switch and can not seem to locate this device anywhere even though the directv support guy told me they could be had at Radio Shack for about 40$. It is NOT the switch that allows for multiple boxes from one output. I only have one cable coming out of my wall. I'm not really in the mood to pay some guy 130$ (plus the 6 hour wait) to install this . Does anyone understand this problem and can they point me in the direction of this multi-switch? PLZ HELP!!!