One easy way to create and display scrollabe text that the Flash designer can easily edit without having to open the .fla is to follow these steps:

1) Set up a dynamic text box instance on the stage, name the instance, set its position and size properties, and right-click the box outline to select scrollable.

2) Write the text for display in an external .txt file which can then be placed in the same folder as the .swf.

3) Use ActionScript to load that .txt file and set the dynamic text to that of the loaded text. (Read the ActionScript for this movie (loadscrolltext.fla) to see the details.)

4) Use the UI Components library to add a UIScrollbar to the stage.

5) Use the Component Inspector window to set the scrollTargetName property to the name of the dynamic text box instance.