If you've really been on the channel since it started, after hitting REC, hit the Options button on-screen and it should give you the option to "Record entire event". Sometimes it doesn't though.... If not, do the rewind-to-the-beginning method already mentioned.If you've watched something for a while and decided you want to keep what you've watched and record the rest, I thought if you hit record it did that. But when I tried to do that, it only recorded from when i hit the record button onward.