Note: this tutorial is out of date. You can use the concepts from this tutorial with this updated tutorial http://gamefroot.com/knowledgebase/pow-shooting-projectiles-missiles-bullets-lasers/
Adding a Script
This tutorial relies heavily on the use of advanced script code blocks. To use advanced script code blocks you must edit an items behaviors. The way that is done is by first right clicking an item on the stage and selecting “edit unique simple behavior on this item…”