I spoke with a friend this morning about using Outlook to do this, and he thought that using Outlook to send a simple email was like using a sledgehammer to drive a finish nail. In order to get Outlook to work, the environment needs to be set up quite thoroughly, and a full instance of Outlook gets started every time you want to send that mail.
My friend suggested using a DLL (not a full application) that has been around for a long time called aspemail (http://www.aspemail.com/download.html). It's much lighter and can be accessed through vbscript. I know that doesn't fulfill what you're looking for, but I thought I would at least report on what I heard.
Thanks,
Mark