In that case I would do it with a Word macro, and make it accessible from the quick access (title bar) tool bar (I have a menu of several).
Code:
Sub AttachMyTemplate()
With ActiveDocument
.UpdateStylesOnOpen = True
.AttachedTemplate = "templatepath"
.XMLSchemaReferences.AutomaticValidation = False
.XMLSchemaReferences.AllowSaveAsXMLWithoutValidation = False
End With
End Sub
BR