Ajar Productions

You can make the alt text appear as a title (which will appear on rollover) by attaching the following code as a .js file in the Resources section of the in5 dialog (how to attach resources):

$(function(){
   $('[alt]').each(function(index,elem){
     var $this = $(this);
     $this.attr( 'title', $this.attr('alt') );
   });
});