Unfortunately, you're going to have to use Win32::OLE if you want to programatically manipulate Powerpoint documents. This is regardless of the language you're using. (OLE in general.. not that module specifically)

If you're going to take the time to figure out how Win32::OLE works (which isn't that much time), you're then going to need the Powerpont Object Model. This will give you all of the methods and properties that are available through OLE.

Hope this helps..
Rich