IE Forms AutoComplete

I am trying to clear the IE Forms AutoComplete. This option is in
Internet Explorer under Tools->Internet Options...->Content->
AutoComplete...->ClearForms

The key to this is in the registry at:
HKEY_CURRENT_USER\Software\Microsoft\Protected Storage System Provider\...

and all the subkeys and values under this key encrypt the form autocomplete values.

The form passwords are stored under:
HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\IntelliForms\SPW

You can delete the passwords using RegDeleteKey(..).

But using Windows 2000 or greater, the permissions prevent
anyone other than an administrator from opening or deleting
the keys with the form autocomplete values.

I know it is possible, because I downloaded a privacy program that can do it.
I used regmon to watch the keys be deleted. I believe the
progam is using the same command to clear this from Internet
Explorer because the only program that ever accesses the
registry is Services.exe just like when it is cleared in IE.
So my basic question is how can this be done?