var lib = fl.getDocumentDOM().library;
var items = lib.items;

(function(){
	var l = items.length;
	for( var i=0; i<l; ++i ) {
		var item = items[i];

		if( item.itemType == "bitmap" ) {
			var oldDirs = item.name.split("/");
			var nameparts = oldDirs.pop().split("_");
			var newName = nameparts.pop();
			var newFolder = oldDirs.concat(nameparts).join("/");
			lib.newFolder(newFolder);
			lib.moveToFolder(newFolder,item.name);
			item.name = newName;
			//fl.trace(newFolder);
			//fl.trace(newName);
		}
	}
})()