save a sheet with code on workbook_open included

Hi again,

I'm dealing with a new challenge and I need your help.
I'm saving only a sheet using the following code:

Application.ScreenUpdating = False
Worksheets("BULETIN").Select
Worksheets("BULETIN").Copy

ActiveSheet.Cells.Select
    Selection.Copy
    Selection.PasteSpecial Paste:=xlPasteValues, Operation:=xlNone, SkipBlanks _
        :=False, Transpose:=False
       Application.CutCopyMode = False

ThisFile = Range("E13").Text & "-" & Range("A" & q).Value
Worksheets("BULETIN").SaveAs Filename:="Z:\blahblah\" & ThisFile & ".xls", FileFormat:=xlExcel8
Application.ScreenUpdating = True
ActiveWorkbook.Close

The question is: is there a way to put a vba code on this new workbook open method?
The goal is that every new xls created to have the following code on workbook_open:

    Dim objNet As Object
    On Error Resume Next
    Set objNet = CreateObject("WScript.NetWork")
    MsgBox "Network username is: " & objNet.UserName
    Set objNet = Nothing

thank you.