I think that you end up having to order them manually, but, IIRC, what you want to do will be easier than dragging all of them.
Go into each playlist and order the display by clicking on the track name header. This should show them to you in the order you want. But they're still not in the player in that order. Now click the toolbar button that has (IIRC -- I'm not in front of an emplode right now) a double headed arrow and the letters A and Z. This will reorder the tracks so that the current display order becomes the playlist order.
If that works, it means you'll have to do it to every playlist, but that's better than dragging every track in every playlist.
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Bitt Faulk