c:\> op-reg-at.pl HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced
use warnings;
use strict;
use Win32::TieRegistry (Delimiter => '/');
my $reg_path = shift or die "Specify registry path";
$Registry -> {'HKEY_CURRENT_USER/Software/Microsoft/Windows/CurrentVersion/Applets/Regedit/LastKey'} = $reg_path;
system('regedit');