There has to be a home run for all of the speakers in the house. HD with tivo takes 2 cables...Probably goes from the wall, into your sat/cable box, rca's from box to your receiver, from your receiver to a speaker selector(if has volume controls in rooms), and from speaker selector to your speakerwires connecting your rooms..
If you have touch panel controls in each room, you likely have a cat5 home run somewhere...
Here's pic of a homerun for whole house audio and control I did a couple weeks ago..
http://www.***boat.com/image_center/...me_run-med.JPG
10 pr speakers and 2 cat5 to each room for keypad control.. Ran 2 to each pad in case 1 got kinked in the run.. No fun to repair after house is done
Here's the HDSatellite home run
http://www.***boat.com/image_center/...00018a-med.JPG
6 from sat LNB, and 1 pr to each of the 7 tv locations. HD sat with tivo needs 2 runs per box... This has since been replaced with a 50" control centerthat whill house a Spaun amplified sat distribution and router for the home netork...