I probably will not be the one to do the macro bit but certainly I could
build a case for cost efficiency.  Some software I'm dealing with does it and
it really is cost effective!  Thank you Doug and Graham for your time!
Roland

Here it is:

Dim MMMDoc As Document
Dim dsource As Document
Dim dtable As Table
Dim i As Long, j As Long
Set MMMDoc = ActiveDocument
With MMMDoc.MailMerge
   If .MainDocumentType = wdMailingLabels Then
       If .State = wdMainAndDataSource Then
           Set dsource = Documents.Open(.DataSource.Name)
           Set dtable = dsource.Tables(1)
           i = InputBox("Enter the number of labels that have already been
used on the sheet.", "Set Starting Label")
           If IsNumeric(i) Then
               With dtable
                   For j = 1 To i
                       .Rows.Add BeforeRow:=.Rows(2)
                   Next j
               End With
           End If
           .Destination = wdSendToNewDocument
           .Execute
       End If
   End If
End With
dsource.Close wdDoNotSaveChanges

It is intended to be run after the main document is set up and ready to be
run.  For XP and later, it could be incorporated into the add-in used for
mailmerging to separate documents and modified slightly so that it first
asked if you wanted to start from the first label on the sheet.  The one
add-in could then be used for both purposes.

I'll get around to making that modification later.