ну writeObject , не ?
Добавлено через 2 минуты

Код AS3:
if (referenceTextField)
{
var description:XML = describeType(referenceTextField);
for each (var item:XML in description.accessor)
{
// clone passed textfield properties that are not readonly
if (item.@access != "readonly") this[item.@name] = referenceTextField[item.@name];
}
}
так ?