Since Word 2007 can open, edit, and save in both formats, it isn't
necessary to convert them all at once. Just convert each one as you open
it for some other purpose.
However, if you're determined to do it, there is a tool you can download
from Microsoft. See
http://www.online-tech-tips.com/ms-office-tips/bulk-convert-office-2003-to-2007/
for description and links.
--
Regards,
Jay Freedman
Microsoft Word MVP
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