[8.2] How can I reproduce the effects of the tempo channel "Wait for QuickTime movie to finish in channel x" setting using lingo?

To get your Director movie to pause on a frame until a digital video sprite has finished playing, put something like this in the frame script:
  on exitFrame
    if the movieRate of sprite myVideoSprite <> 0 then go the frame
  end exitFrame

This simply tests whether the sprite is still playing and, if it is, loops back on the same frame. Note that if the loop of cast property is true for the cast used in the sprite in question, this will never exit.