[Zope] How can I protect my softwares in Zope

While I recommend Zope to others, I was offen questioned this kind of question: "How can I protect my softwares in Zope"? As I know, once I got a Data.fs, I can access this Data.fs by creating an emergency admin account. Is there any way to absolutely lock (protect from source DTMLs, ZClasses be viewed) 1. the Data.fs 2. ZClass-based Products 3. external methods 4. and the Instances Thanks for any suggestions. Iap, Singuan