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I'm not a programmer, so I don't have too much to contribute. However, when I was checking Windows 8 compatibility with older programs, I noticed Office 2003 had an "X" beside it indicating that it wasn't compatible with the newest version of Windows. I'm just speculating, but this may suggest that it will take a lot of work on your part to make Office 2003 programs compatible with the new Office. I might be wrong though, and hopefully I am. Good luck!