Download the easy install zip and upzip it on your local machine.

In the folder bridge/src/flash you'll find a file named sampleAS3.fla. This is basically an empty file but the essential thing is that i have set the document class for you already.

In your Flash IDE go to File -> Publish Settings -> Flash -> Actionscript 3.0 Settings and there you'll see an input field that says com.yourdomain.YourClass

You can find this class here: bridge/src/classes/com/yourdomain/YourClass.as and in the .as file you'll find some further explanation of how to use this class.

You can build your own application based on this class.

After you have compiled the .fla you can find the resulting .swf in bridge/web/static/swf but of course you can change the path in the Flash IDE: File -> Publish Settings -> Format