This requires the prototype library as I don't code anything without it :
$('childFrameId').observe('dom:loaded', function() {
$$('#childFrameId a').each(function(element) {
element.target="_parent";
});
});
Slap an ID on that child frame and replace childFrameId with whatever you name it. I haven't tested that but it should work just fine
Hope that helps!
Yay 100 posts :P