Almirena said it all, but here's another hint.
To get full points for your actions, do this. Wait till midnight OUTSIDE the cemetary, when it says 'your getting tired', it's midnight. Use the undead unguent on yourself and go in the graveyard, take the root and dart out.
The reason why doing it like that is better is this. Getting points for the cemetary at midnight/rubbing the unguent is different for each version of QFG 1, in one of them (I forgot which) you get points for using the Uguent at midnight, while in another (I forgot too), you get points simply for entering the graveyard at midnight. Doing it in the above way will make sure you get the points.
Till next time stay cool