Get permission first if you want to distribute the Widget. As described in our end-user license agreement*, you may use and modify the JavaScript code in any of the built-in Widgets. You may not distribute a Widget that contains any of the images, sounds or other assets from someone else's Widget unless you first obtain permission from the author of that Widget (you can use it on your own computer, of course).

* On Microsoft Windows, the agreement can be opened from Start > Programs > Yahoo! Widgets > EULA.