The old http://www.ecs-safe.com/Reset_subinacl.zip link doesn't work anymore.
However, you can still download it here: Reset_subinacl.zip
Or here: Reset_subinacl.zip
There's some documentation here:
http://groups.google.com/group/microsoft.public.windowsupdate/msg/f7d73177367bab34?hl=en
Here's what Reset_subinacl.zip contains:
C:\>unzip -v Reset_subinacl.zip
Archive: Reset_subinacl.zip
Length Method Size Ratio Date Time CRC-32 Name
-------- ------ ------- ----- ---- ---- ------ ----
843 Defl:N 243 71% 08-07-05 09:33 c868c210 Reset_Subinacl/reset.cmd
290304 Defl:N 105240 64% 06-12-04 05:33 90b58a75 Reset_Subinacl/subinacl.exe
-------- ------- --- -------
291147 105483 64% 2 files