Convert External AS3 File To Internal Actions

I’m wondering if there’s a “fix” for converting a tutorial that uses an external .as file to using ActionScript internal to the Flash file itself.

For example, the Colorful Explosion tutorial runs all of its ActionScript from a separate file that must be present with the swf file to run the animation.

http://www.kirupa.com/developer/as3/colorful_explosion_page1.htm

Is there a way to have all of the animation ActionScript run from within the swf file by, say, pasting the code into the Actions panel or other internal method?

I just don’t want to complicate a project with multiple files and want others to only have convenient access to a single swf file.

Thanks for any help.