[Zope] Adding many instances at once

Hallo, how can you add many ZClass-instances at once. I mean with the correct content,title and other properties.The example(adding zclass to a zclass)is always adding one class.The next problem is how to deal with the properties in a form if you don't know how many items are added by the user?? User A is adding three news-items at once, the next is adding 5.