Hello, I have recently purchased the RCA 52" HDTV (D52W23) and the Insignia Home theatre (IS-HTIB 102731). I have Comcast Digital Cable with the DVR (Silver Motorola box. I am trying to link these all together but am having trouble. I have read and read the manuals and I am at wits end. I have gone to Best Buy and bought the optical cable and S video cable. Please can someone help me?? Thanks