from the link you didnt read
Although the registry appears to be in one file, it is actually placed on your computer in several files. Depending on your system configuration, registry files can be found in any of the following locations:
C:\Documents and Settings\User Name\ on Windows 2000, XP.
C:\Windows\System32\Config\ on Windows 2000, XP.
C:\Windows\ on Windows 95, 98, ME.
C:\Windows\Profiles\ on Windows 95, 98, ME.
Registry data is usually stored in the following files, typically referred to as 'registry hives':
System.dat, User.dat, and Policy.pol, on Windows 95, 98 and ME.
Security, System.alt, Default, Sam, Software, System, Ntuser.dat, and other files, on Windows NT, 2000 and XP.