It's really not feasible to do as you ask. Besides, there are far more cases than just Mr. and Ms. you'd need for consider, including abbreviations such as: 'Dr.' 'Mrs.', 'i.e.'; 'e.g.'; and 'etc.', the last of which may or may not occur at the end of a sentence. IMHO, though, the whole idea of having two spaces after each sentence is archaic; it harks back to the days of typewriters with fixed-pitch fonts and has no place in a modern document using proportional spacing and/or justification.

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Cheers,
Paul Edstein
[Fmr MS MVP - Word]