[Zope] Create and edit by a script but not by management screens ...

Hi ! I just made a script called by a form , that create one Object and fill its properties obj=context.manage_addProduct['MyProduct'].MyObj.createInObjectManager(id, {}) for p in baseFields[0].keys(): obj.propertysheets.propertie1.manage_changeProperties({p : request[baseFields[0][p]]}) the problem is that this script is called by Anonymous users and the object is stored in a temporary folder that i can moderate so in this folder, anonymous can "Add MyObjs" and "Manage Properties" but it's not secure at all !! but if i don't add thoose two permissions i can't create or edit the properties of this object :-( any solution ? thx a lot !! Célio Conort