これで始められるはずです。
Sub Tester()
Dim x, w, c
ThisDocument.Tables(1).Delete
ThisDocument.Tables.Add Range:=Selection.Range, NumRows:=7, NumColumns:=1, _
DefaultTableBehavior:=wdWord9TableBehavior, _
AutoFitBehavior:=wdAutoFitFixed
With ThisDocument.Tables(1)
.Rows.Height = 70
w = .Rows(1).Cells(1).Width
.Rows(1).Cells(1).Split 1, 7
.Rows(1).Cells(1).Width = w / 2
For x = 2 To 7
.Rows(1).Cells(x).Width = (w / 2) / 6
Next x
.Rows(5).Height = 15
.Rows(7).Height = 15
.Rows(7).Cells(1).Split 1, 7
.Rows(6).Cells(1).Split 1, 4
.Rows(6).Cells(2).Split 2, 1
'Once you merge cells it gets difficult to use .Rows, but
' you can still address individual cells. Use the loop below to
' find out which one you need to operate on...
x = 1
For Each c In .Range.Cells
c.Range.Text = x
x = x + 1
Next c
.Range.Cells(16).Split 1, 4
'you can figure out setting the exact required widths...
End With
End Sub