MS does not offer a 64 bit version of Microsoft Office 2003.
http://support.microsoft.com/kb/895361/en-us?FR=1
"A summary of the support boundaries for Office programs that run on 64-bit versions of Windows operating systems"
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microsoft office 2003 professional with 64 bit os support
Is there a difference in cost between 32 bit version and 64 bit support version>>
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I hope this helped you,
Bob Buckland ?

MS Office system products MVP
LINKS for the 2007 Office System
1. Read about it, try it, or watch the movie

the 2007 Microsoft Office system iinfo is at
http://microsoft.com/office/preview
2. Already have 2007 Office System Beta 2?
Send Microsoft your feedback (with pictures)
http://sas.office.microsoft.com/
3. Use the 2007 OfficeOnline website without Office2007
a. Install the ActiveX access control
http://office.microsoft.com/search/redir.aspx?AssetID=XT101650581033
b. then visit
http://officebeta.iponet.net