Word does not come with any import filters for its bibliography tool. So
unless you wrote them in the required xml format in your Word 2003 document,
Word won't be of any help here.
If you wrote the information in some kind of structured way (BibTeX,
EndNote, MODS, Marc21, ...) you could try BibUtils. It is a set of
commandline programs which convert well-known bibliography formats into the
MODS format, after which you can convert them to the Word 2007 format. The
tools are located at
http://www.scripps.edu/~cdputnam/software/bibutils/
If you didn't wrote the bibliography in any of those formats, you will
probably be out of luck. That said, there are tools out there which can help
you to create your entries in a faster way (download them) than having to
retype them. For example, there is the Reference Manager add-on from
memento. It's a free tool and a demo video can be found at
http://findnwrite.com/clients/word/refmanager.htm . The full tool can be
downloaded from
http://ragrawal.wordpress.com/2009/03/07/releasing-reference-manager-beta-for-word-2007/
Yves
