Your DVD Recorder will only see the single output from the Digibox. ie. it will only see the program that the digibox is tuned to. The output from the digibox can be either on the scart lead or RF on channel 28. In order to record something on BBC Four it will be necessary to set the digibox to Four and leave it, you cant watch anything else off the digibox whilst the program is being recorded. You can still watch the analogue channels but not the digital. Hope this makes sense. If you want to watch other digital channels you will have to buy a second digibox.