And...

If you cannot get closure working, you can always store fields on the widget and reference them at time function is called using the 'this' keyword.

CF.widget("BTN_ON_" + (i+1)).myID = actors[i].id;

And inside your onPress function, you can do the following:

function pressHandler()
{
// this keyword points to actual widget inside onPress.
System.print(this.myID);
}

CF.widget("BTN_ON_" + (i+1)).onPress = pressHandler;