First crush the chocolate cream filled cookies, if you have never done this before, double bag the cookies and use a rolling pin to break them up.  Kids love to do this bit!  Once you have broken all the cookies up, set aside and start making the pudding.  Make the pudding as directed, using 3 1/2 cups milk, and let stand for 5 minutes.  Fold 3 cups of the whipped topping and 1/2 of the crushed cookies into the pudding mix.  Spoon into the baking dish, level the top of the pudding mix. 

The remaining crushed cookies are then sprinkled on top.  Place the pudding in the refrigerator for an hour.

While the pudding is in the refrigerator you can decorate the cookies.  With the tubes of icing decorate the cookies with words such as "BOO" or "R.I.P"

Once the pudding mix has been in the Fridge for an hour, your Graveyard can be decorated.  Place the cookies in the pudding mix.  Use the remaining whipped topping to create swirls of "ghosts", you can do this with a spoon or if you have a piping bag you can use that.  Chocolate sprinkles or the icing tubes can be used for the eyes of the ghosts.  Finally scatter the candy pumpkins, candy corns and the worms around the graveyard.