How do I hook up the DVR w/ an older Panasonic TV, a DVD/VHS & Sony audio video control center? DTV came in & hooked up the DVR & I could not use the DVD. I tried to hook up DVD and lost the TV. There are a lot of wires & I do not know what goes where. I know I should be able to have everything hooked up at the same time & just switch from the TV to DVD.