Vista has introduced new feature called UAC (User Account Control). In short it basically controls the way in which applications are executed by different users. Due to enforcement of this UAC, by default any application on Vista will run under the context of standard user instead of administrator. As a result the application which requires administrator privilege will fail to work properly on Vista.
So VistaUACMaker is designed to address this problem by making any Windows XP based application compatible with Vista as well as Windows 7.
Newer version comes with more enriched look & feel, making it beautiful tool to use. For more technical details and to download, please visit the main page of VistaUACMaker.