This walk through was done in Navisworks 2010 by me on a Friday afternoon. It took a total of 2 hours to complete from start to finish and was completed by creating a new animation, selecting different veiws through out the different levels and adjusting the cut through depth from top to bottom. Then when all veiw points were saved I dragged and dropped them in order into the animation tab and Navisworks did the rest (created the flow from viewpoint to viewpoint).
Enjoy
