[Zope] Getting Propertysheets of Baseclasses

Hi, hope this is possible to do with ZClasses: I have a ZClass with a property sheet named Attributes and then I derive a ZClass from the first one. This new ZClass gets a propertysheet NewAttr, but in it's _add script I need to set some properties which are only in the base class' property sheet. How do I acces it, as .Attributes.manage_editiProperties doesn`t work Andreas -- You'll feel much better once you've given up hope.