How  many items do you need to drop? What sort of items are they, props or figures? Do they all need to drop to the same level, or to different levels?

There are drop to ground Python scripts, including a couple that come with P6. I have never herd of one that will drop things below the ground plain. However there may be a workaround, depending on exactly what you need to do, so some more details may help.

Have you looked on Ockham's site:

http://ockhamsbungalow.com/Python/