Do you mean you want to specify a template when you create a new document? You do that with an argument to the Documents.Add method call that creates the document:
Set docMyDocument = wrd.Documents.Add Template:="template name"
If you really mean you want to open an existing document with a specific template, you can't. You can change its template, though. You do that by setting the AttachedTemplate property of the Document object to the name of the new template:
MyDoc.AttachedTemplate = "Normal"
The change will only be temporary, unless you save the document after you change it. Rick Sprague