When swapping a disc out to a completely different image, the Tivo will remember which remote control address (4 in my case) the Tivo was set to. There is a deeper "bong" in the system than the deeper bong that you get at the bottom of a page for example. When I put the AltEPG image on my Dev Tivo it had some phantom progs in "Now Playing". Trying to play these results in the very deep and timbrous bong. Looking at the chips on the mainboard I noticed that the MPEG2 chip is actually badged IBM. Add that one to the IBM PowerPC processor.