VSTO 2005 Addin does not load in Outlook 2003 if UAC is disabled

Windows Vista changes the COM Activation model and will no longer create components registered in HKEY_CURRENT_USER (HKCU) if the client application is running with a Integrity Level (IL) of higher than medium. So when UAC is disabled, Outlook will run with High IL.  By default, the setup project for VSTO 2005 registers the COM component…