Best way is to use a mail merge to Word 2003.

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Sue Mosher, Outlook MVP
Author of
Microsoft Outlook Programming - Jumpstart for
Administrators, Power Users, and Developers
http://www.outlookcode.com/jumpstart.aspx
>I 'm looking for help so that I can send an email to everyone in my address
> book (about 400) at once using outlook 2003.