I might be getting a TiVo Series 2 DT from a friend. I had one in the past (but sold it) and it controlled a Comcast DTA box with the connected TiVo IR blaster. All worked good. If I get this Series 2 from the friend, it might not have the IR blaster. If so, I was wondering if I could use the IR blaster that was included with the Comcast DTA box. It looks similar and has the same 3.5mm jack at the end. The only thing I am thinking about the Comcast DTA blaster is it seems like its an "input" (receiver) device in that it accepts a remote signal to change the channel on the DTA box. This way, you can possibly hide the DTA if needed. The TiVo blaster seems like an "output" (transmitter) only device in that it basically sends a signal to an external box based on what is coming from the TiVo. Is this about right and the way each work? In which case, will the included Comcast IR device not work with TiVo S2 as its "blaster"?