Okay so you get your disk which is, say three hours long, and if they are worth their salt builds up to a climax at the end of the evening, say the last hour. But on the day the speeches over-run by an hour (which happens regularly!) so now your three hour disc only has two hours to cover, how does it decide what to leave out to ensure the evening still builds to the climax, same [problem as an ipod wedding, all of a sudden you need someone to sort it out!