[Zope] Undo log

Is there any way to log specific messages, or customize the message a transaction leaves in the undo log? I have a method that does a both updates and deletes an object. I'd like to be able to show in the undo log which event was executed. For example: current undo log: /path/document_edit by mark 2002-08-13 11:29:41 AM /path/document_edit by mark 2002-08-13 11:29:27 AM want it to show something like: /path/document_edit deleted by mark 2002-08-13 11:29:41 AM /path/document_edit updated by mark 2002-08-13 11:29:27 AM Thanks, Mark