.cod will not convert to .alx. alx is just a loader for the cod file. You can create an alx file is you follow the example I am enclosing here, just make sure you edit it in notepad or any txt editor, and replace the name "earthsea3.2" or "earthsea32" with the name of the application you plan to load. Then save the file as "Name of application.cod", just omit the " and no spaces in the name of the file. Make sure the new .alx file is in the same directory as the .cod file it will load and you are ready to go.