I recently needed to add an account to an IIS6 Application Pool, but I did not know the password. No one else knew the password either.
However, I found out that the account was being used by an IIS6 application pool on another Windows Server 2003 machine. So I loaded the IIS 6.0 Resource Kit Tools, which includes the lovely tool “Metabase Explorer”.
After I launched the Metabase Explorer application, I navigated my way to the application pool that was using the password I needed to obtain. Select the option to “View Secure Data” and bingo! there is the password.