In 2008.10, the way to use the script is to drop it on the Builder, for instance. However, to make the kind of ribbon you want, you should change the parameters. If you just downloaded it, and dropped it directly, and it failed, probably the script got messed up somehow. Try to follow the tutorial, and if you fail at some point, let us know in more detail what you do, and how it fails, otherwise we cannot really help.