I get it. You find the starting point, then the ending point and create a
range between the two numbers.

I added some additional data and markers creating the following code:

Public Sub GetFmr()
Dim oRng As Range
Dim myRange As Range
Dim i As Long
Dim y As Long
Dim m1 As String
Dim m2 As String
Dim bm As String
Dim X As Integer

X = 0
m1 = "[FMR Data]"
m2 = "[FMR Data1]"
bm = "dv8"

Start:
Set oRng = ActiveDocument.Range
ActiveDocument.Range(0, 0).Select
With oRng.Find
 .Text = m1
 .Wrap = wdFindStop
 If .Execute Then
   i = oRng.End
   oRng.Collapse direction:=wdCollapseEnd
   .Text = m2
   y = Len(.Text)
   If .Execute Then
     oRng.Select
     Set myRange = oRng.Duplicate
     myRange.Start = i + 1
     myRange.End = oRng.End - y
     End If
 End If
End With
ActiveDocument.Bookmarks(bm).Range.InsertAfter myRange.Text
If X = 0 Then
   X = X + 1
   m1 = "[BS Data]"
   m2 = "[BS Data1]"
   bm = "dv13"
   GoTo Start
End If
End Sub

I hate to hard code variables, but I'm told there will be a standard set of
markers. It occurred to me that I should put some error trapping on a not
found condition. Maybe if myRange is 0, then go to a continue label. Also,
when I added the extra lines at the end, the macro seems to put an extra line
in the target bookmark.

My plan is to put this in a macro that runs when the document is opened the
first time. I think that kind of macro is AutoOpen in Word. Anyway, I'd set a
constant with a value of 0. The macro would only run if the value was 0. When
it finishes running, I'd set the constant to 1.

Thanks,

Steve