Normally when you download a script from a forum, all you have to do is change the .TXT extension for .PY. It sounds as if the file has become corrupted somehow. Where did the file come from? If one of us can download it, we can probably see where the problem is. You could try this - open the .TXT file in Notepad or similar, then save it again. That should get rid of any dodgy characters, and you can rename the extension to .PY.