Hey not to confuse "Rob" with "Russ".  I originally asked if I indeed needed
to "split" the document up.  For the benefit of "Russ", I intend to do this
on a "per-section" basis.  I.e.  for each section, create a new document
containing that section only, perform the mail merge with the data source on
that section.  When all sections have been mail-merged, combine the
resulting documents together.

Another of my posts below asks how to copy sections from on document to
another.  The solution given in the microsoft.public.word.vba.general
newsgroup was:

"Look up the FormattedText property in the Word VBA Help. There is a code
sample that describes what you need to do."

This of course refers to automation/vba.  I'm not sure if you want to do
things this way.