How do I install a script into studio

AliKat

http://docs.daz3d.com/doku.php/public/software/dazstudio/4/referenceguide/scripting/api_reference/samples/actions/action_trigger/start#example_with_settings

What needs to be done after it's downloaded?

Richard Haseltine

Drag it into the Viewport to run it immediately, or put it in a Daz Studio Format content directory (e.g. /Documents/Daz 3D/Studio/My Library/Scropts/Utilities/) to make it available in the content Library (and then, optionally, right-click>Create Custom Action).