Here is how you add the script to your menu.
File>Open and Run script from URL
Check that the script is added and running.
You now have two new menu items “Create” and "Remove"
Go somewhere and create a "Kitchen Sink"
Have fun and let’s add some more objects to the menu. If you want to find more scripts check out this https://alphas.highfidelity.io/t/fun-and-useful-js-scripts/154/8