This is another popular utility from Mark Russinovich and Bryce Cogswell. Although
NTFSDOS isn't a registry-editing tool, it deserves mentioning here because it is a
valuable tool for the quick recovery of missing or corrupt files needed to load Windows
NT/2000 (these files, of course, include registry hives). NTFSDOS Professional is a
small utility and can be started from system disks.
NTFSDOS Professional also contains the NTFSCHK tool for checking NTFS disks under
DOS. It will allow you to check the hard disk and perform recovery processes if boot
problems are caused by corruption of the NTFS disk structures.
Download the trial version of NTFSDOS Professional from http://www.sysinternals.com.
Note that although NTFSDOS Professional isn't freeware, the authors do provide a
freeware utility of this type-NTFSDOS (which is provided with the source code).