Unfortunately non-existant!
I can see how to do it using automator on the Mac, but that's not an option
in the current situation.
If you can deal with that, you may have already won a fre.. ooops. Wrong spiel.
You may be able to work from this:
Batch: Do something to every file in a folder
http://www.rdpslides.com/pptfaq/FAQ00536.htm
Modify sub MyMacro along these lines:
Sub MyMacro(strMyFile As String)
' this gets called once for each file that meets the spec
' you enter in ForEachPresentation
' strMyFile is set to the file name each time
' Probably at a minimum, you'd want to:
Dim oPresentation As Presentation
Set oPresentation = Presentations.Open(strMyFile)
With oPresentation
.ApplyTemplate FileName:="C:\Whatever\Something.pot"
' change the string in quotes to the full path to your
' template
End With
oPresentation.Save
oPresentation.Close
End Sub