Slight clarification on running the examples from the Finder.

Mac/OSX/Extras.ReadMe.txt

@@ -5,5 +5,8 @@ among Python on all platforms, so there are some that only run on Windows
 or Unix or another platform, and/or make little sense on a Macintosh.
 
 Some examples can be run from within the PythonIDE, but many will require
-that you start them from the command line, or supply command-line arguments
-by holding down the "alt" key when double-clicking them.
+that you start them from the command line or with PythonLauncher. In the
+latter case, you can supply any needed command line arguments by holding
+the "alt" key while dragging the script to PythonLauncher (or while
+double-clicking the script, if PythonLauncher is set as the default application
+to open Python scripts with).