See the "Multiple items per condition" item under the "Special merges"
section of fellow MVP CIndy Meister's website at
http://homepage.swissonline.ch/cindymeister/MergFram.htm

Or, you may be able to modify the following macro to do what you want:

' Throwaway Macro created by Doug Robbins

' Macro to create multiple items per condition from a directory type
mailmerge

Dim source As Document, target As Document, scat As Range, tcat As Range
Dim data As Range, stab As Table, ttab As Table
Dim i As Long, j As Long, k As Long, n As Long
Set source = ActiveDocument
Set target = Documents.Add
Set stab = source.Tables(1)
k = stab.Columns.Count
Set ttab = target.Tables.Add(Range:=Selection.Range, numrows:=1,
numcolumns:=k - 1)
Set scat = stab.Cell(1, 1).Range
scat.End = scat.End - 1
ttab.Cell(1, 1).Range = scat
j = ttab.Rows.Count
For i = 1 To stab.Rows.Count
   Set tcat = ttab.Cell(j, 1).Range
   tcat.End = tcat.End - 1
   Set scat = stab.Cell(i, 1).Range
   scat.End = scat.End - 1
   If scat <> tcat Then
       ttab.Rows.Add
       j = ttab.Rows.Count
       ttab.Cell(j, 1).Range = scat
       ttab.Rows.Add
       For n = 2 To k
           Set data = stab.Cell(i, n).Range
           data.End = data.End - 1
           ttab.Cell(ttab.Rows.Count, n - 1).Range = data
       Next n
   Else
       ttab.Rows.Add
       For n = 2 To k
           Set data = stab.Cell(i, n).Range
           data.End = data.End - 1
           ttab.Cell(ttab.Rows.Count, n - 1).Range = data
       Next n
   End If
Next i

(shipping labels)- with multi merge line entries in body - want to send data
to a new page when the order number changes (or if easier when line number
goes back to "1") but keep the correct shipping label info at bottom of
page.  Been studying the fieldcodes but I am not advanced enough-need help!
All of the data (ship to,bill to, subtotals etc) is included in each data
source entry - need to goto new page when order changes -