ライブラリのアイテムをMovieClipの変換してクラスもつける

gistfile1.js

var dom = fl.getDocumentDOM();
var items = dom.library.getSelectedItems().concat();
var i = 0;
for each(var item in items){
	i ++;
	dom.library.addItemToDocument({x:0,y:0},item.name);
	var arr = item.name.split("/");
	var symbol = dom.convertToSymbol("movie clip",arr[arr.length-1],"top left");
	symbol.linkageExportForAS = true;
	symbol.linkageExportInFirstFrame = true;
	symbol.linkageBaseClass = "flash.display.MovieClip";
	symbol.linkageClassName = "Hoge"+i;
}