Работа со String

[xpymbl4]

var str:String = "Woke up and I feel like shit I don't remember last night, I'm getting sick of this I hit the bottle when I got off stage And got piss drunk stupid and went in a rage I think I mighta got into a fight Because my knuckles were bloody and I don't feel alright I hit the bottom and I don't even care Some say I'm going to hell but I'm already there Sick and tired of being sick and tired";
var strResult:String = '';
var strTransfer:int = 80;
for (var i:int = 0; i < str.length; i ++) {
     strResult = strResult + str.charAt(i);
     if ((i % strTransfer == 0) && (i != 0)) {
          strResult = strResult + '\n';
          trace(i); //80, 160, 240, 320 ...
     }			
}			
trace(strResult); // Строки по 80 символов.

Добавлено через 2 минуты
Сорри, мой вариант будет медленнее