Resplendent Registrar for Windows XP/2000/NT/ME/9x is a full-featured
registry manager that comes with a set of tools that should fulfill
all your registry editing needs. It could be an excellent replacement
for RegEdit or RegEdt32 which come shipped with Windows, or any other
registry editor. It allows cutting, pasting, copying, and moving of
keys and values as if it were Windows Explorer. It has extensive
search and replace capabilities, a bookmark editor that optionally
colors bookmarked keys and adds key descriptions, flexible value
editors that allow importing data from files, a registry monitor that
logs registry activity and even allows restoring changes made by
external applications. Additionally, it allows viewing and editing,
importing and exporting of .REG files and provides backup and restore
functionality for safety. All operations made by the program can be
individually undone. When running on WinXP/2000/NT it provides all
the security editors for setting of permissions, auditing and
ownership information of registry keys.

For more information:
http://www.resplendence.com