I can't see why merging shouldn't work for mergefields outputting dates or formatted numbers. At most, if the fields are remaining in the documents post-merge, your commented-out line of code:


oWordDoc.Fields.Unlink
is all that's needed (the equivalent of Ctrl-A, Ctrl-Shift-F9). Indeed, you can even do that without doing any merging. Either way, having converted all your fields to plain text, replacing the text results with your "simple codes within square brackets" should be a breeze.

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Cheers,
Paul Edstein
[Fmr MS MVP - Word]