im not sure if this has been covered already, but im having trouble hooking up my new LG DVD-recorder and the comcast DVR. right now i have it coming from the DVR via coaxial cable into the DVD-recorder and out through component RGB video and R/L audio to the HD flat screen. the picture gets shrunk by about 25% when i do this and I can't seem to enlarge back to the full screen. what gives? thanks!