Excel Multi Threading and Manual formulas VB Script

HI
I want to be able to create a XLAM file using Vbscript that will do 2 things
1 = Set formula calculation to manual and calculate before save to True
2 = Disable Multi thread calculation

I can get the disable multi thread calc to work using this script and placing he xlam file in the XLStart

Private Sub Workbook_Open()
    ' Disable MultiThreaded Calculation '
    Application.MultiThreadedCalculation.Enabled = False
     
    ' Other options '
   
    ' Automatic Mode '
    ' Application.MultiThreadedCalculation.ThreadMode = xlThreadModeAutomatic '
   
    ' Manual Mode '
    ' Application.MultiThreadedCalculation.ThreadMode = xlThreadModeManual '
   
    ' Use 2 CPU '
    ' Application.MultiThreadedCalculation.ThreadCount = 2 '
   
End Sub

But when I try to add in the manual formula part using this script it does not work

Application.Calculation = xlManual
    Application.CalculateBeforeSave = True

Can you help me as I am not at all good with VB script
Thanks Marcus