I hooked up 3 cameras using 4-In 2-Out IR Learning A/V Switchbox http://www.radioshack.com/product/ind...I took tivo a/v out 1 to tv out 2 to switch box,then i have 3 caneras from harbor freight http://www.harborfreight.com/cpi/ctaf...not the best but woork good and cheep.1 ir (from sling box) to tivo the other to switch box.I use my xv6700 phone the most so i used the remote arrow up,down,slect,and the star by the number pad to switch the box.Now if someone is watching tv i could see(cam in living room).The only problem it is hard to work tvio on phone or computer with out changing the cams,just have to get use to it.Still working on the setup