Comment on KeyViewer

Is this a joke? It's like making an applescript to open Safari or some other Apple-supplied app or utility. This viewer is easily accessible through the menu if you have your language checkbox checked in preferences. If you don't want that, just trigger the script under /System/Library/Components/KeyboardViewer.component

You can do it with QuickSilver by typing "KeyboardViewer" or anything else that launches things on your mac. No need for Applescript here.