Even though the following article is about recovering from registry problems, it describes the location of the 5 registry files:
"How to recover from a corrupted registry that prevents Windows XP from starting":http://support.microsoft.com/kb/307545
I later found the following article, which describes the registry in more detail:
"Windows registry information for advanced users":http://support.microsoft.com/kb/256986
Edited by M..., 08 August 2008 - 08:21 PM.