I don't know if you can create properties like you want, by using this['']. But for what you have said you can just have an array:
var clips:Array = new Array();
inside the loop:
for (var i:int=0;i<10;i++){
clips.push ( new Loader() );
}
then you can just use clips[i] wherever you want.
--
Jhonny Everson

