I first thought of making a copy of the whole programme on the HDD, editing out the unwanted parts, and copying to DVD. Then repeating that for the second part. But I couldn't see a way of making a copy on the HDD.
After browsing the manual I found the 'Divide Title' feature. With that I manage to split the 6 hour recording into 4 parts with parts 2 and 4 having the material I wanted to copy to DVD. Clearly now the original 6 hour recording is no longer a 6 hour recording but is now 4 separate 'titles'.
Was that the only way of achieving my goal?
Were there alternative ways of doing this sort of thing?