Hello, I have a 52" Sony Bravia, model #KDL-52XBR5. I have a Motorola HDTV digital cable box - it only has DVI output, NOT HDMI. The TV has an option for picture in picture (PIP). Initially, the current channel becomes the left picture, and the right picture is static. When I focus on the right picture and change the channel on the digital box, the left picture changes and the right pictures remains in static. Does anyone have any experience in using a digital cable box and PIP? Is it possible to get a unique channel for each picture via a digital cable box? Thanks.