If you click "Manage Sources", the Source Manager dialog will pop up. It
contains a "Browse..." button. Using that button, you can load xml files
which are in the correct format. So you don't have to input everything by
hand. You just have to find (or write) a tool which stores your data into
the desired format.
Some examples of such tools:
1)JabRef (
http://jabref.sourceforge.net/)
This is a complete system to store and edit references. Internally, it uses
the old arcane BibTeX format to store the data. Using the export function,
you can generate valid xml files for Word 2007/2008.
2)Connotea (
http://www.connotea.org/)
This is a free online system to store references. It also comes with an
export function for Word.
3)EndNote (
http://www.endnote.com)
This one is not free, but is probably the most well known bibliography
packet. By itself, it can not export data to the format used by Word afaik.
However, using BibUtils
(
http://www.scripps.edu/~cdputnam/software/bibutils/) you can convert
between the EndNote format and MODS and between MODS and the Word format.
4)Excel
Like I stated in my original reply, if you know the xml format your excel
sheet is in (which you should as you created it), you could write an xsl
transformation which can convert your data into the Word specific format. Of
course, this solution requires you to have at least some basic xslt
knowledge.
Yves