Use a catalog (or in Word XP and later, a directory) type mailmerge main
document that uses the address list as its data source and in which you have
the merge fields in the cells of a one row table. After you execute the
merge, you can insert a row at the top of the table and enter the field
names into the cells of that row and then edit/add to the data and then save
and use that file as your data source.
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Please respond to the Newsgroup for the benefit of others who may be
interested. Questions sent directly to me will only be answered on a paid
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Hope this helps,
Doug Robbins - Word MVP