From that link look at #3 under "Configuring the Stats tab":
http://www.pokertracker.com/products/PT3/docs/?doc=advhud; that will show you how to change the dimensions of a HUD panel using "new line", adding/removing stats from an existing line, etc.
To use separate HUD panels you'll want to see "Configuring the Group tab" in that link. Essentially what you'll do is create new groups, populate them with stats (i.e., divide up your existing stats between new groups) then each group displays its own HUD panel; it's those which you'll position above/below/next to players at the table (and click "Save Layout" once arranged).
Mike