Executing a script is as easy as calling a menu command. Just go to the "Tools->Run script" menu item and select the script you want to run.
The script menu displays the scripts in the same hierarchy as they are located in the "scripts" folder. The "scripts" folder should be in the same folder as Cheetah3D itself. Otherwise Cheetah3D won't find the scripting files.
To install a new script just copy it to the "scripts" folder. After restarting Cheetah3D it will appear in the scripts menu.
Attention: Cheetah3D only adds files with the extension ".js" to the menu.