I have a Panasonic DMR-E55 and I can't see how to change the RF output channel. It is overlaid on an existing channel, and the manual says RF output can be in the range of CH 21- 68. I need to do this to be able to pump DVD output round the house with the rest of my channels (from NTL cable and TiVo). I'm sure there is a more expensive solution but at the moment I just want to prove this works OK using RF output. Does anyone have any idea how this is done please?