The dump file is a library you have to import (I believe from the file menu). It will add another category to your text expressions. It contains a bunch of text expressions that are "hidden" and appear grey. It is clear as to what they are KS for keyswitches (moving horizontally through a matrix) and CC1 for moving veritcally through a matrix.
Human playback is something else and can only be seen if you've followed the directions included with that file. You have to choose the VSL Playback options in the Human Playback Preferences. But you can only do that if you've imported the preferences as outlined in the instructions.