You need to put it into a .jpg format or a .pdf format and run an optical character recognition program on it. There is no such program built into Office 2003. One almost certainly came with your scanner (if you have a scanner).

From Google:
Top 5 Free OCR Software Tools To Convert Images Into Text

Free Online OCR - convert scanned PDF and images to Word, JPEG ...

Comparison of optical character recognition software - Wikipedia ...