Locking browser preferences

Question: Is there a way to lock the preferences in Netscape or Mozilla so that students cannot change the home page or browser settings?

The IT Guy says:
One way to lock students out of changing browser preferences as well as many other system settings is to use commercial desktop security software like Fortres 101 (http://www.fortres.com/products/fortres_101.htm) or Foolproof Security (http://www.riverdeep.net/.../security.jhtml).

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