This new KB explain step-by-step how to recover deleted items or deleted public folder in Exchange 2000 or in Exchange Server 2003 using PFDAVAdmin tool.
It follows the introduction of Kb below:
This article describes how to recover deleted public folders or items that are deleted from public folders in Microsoft Exchange Server 2003 or in Microsoft Exchange 2000 Server. You can use the Microsoft Exchange Server Public Folder DAV-based Administration (PFDAVAdmin) tool to recover public folders or items. You can use the methods that are described in this article when you cannot recover folders or items by using the Recover deleted items command in Microsoft Outlook.
This new article can be found at http://support.microsoft.com/?id=924044