[this.create]

var mn:MovieClip = this;
var loader:LoadVars = new LoadVars();
loader.load('tx.txt');
//
loader.onLoad = function(success:Boolean):Void  {
    if (success) {
        var tf:TextField = mn.createTextField('tf', mn.getNextHighestDepth(), 0, 0, 600, 100);
        tf.html=true
        tf.multiline=true
        tf.wordWrap=true
        tf.htmlText = this['tx'];
    }
};

файл tx.txt - текст в одну строку, без переносов.

tx=because it is the beauty<br>because it is the blessedness<br>a cup of goodfeeling.a 

goblet of the soul substance<br>i like the golden whirlwinds in my face when being with 

the sun. to challenge the wind for a run /to drink tea/<br>to laugh.with mouth.wide 

open.in the rain.to yearn for.to look for.into myself and in the bees.to understand.to 

find/not find