external URLs or not

I'm trying to use the Modal Frame API with some success but I've come across a detail that I find strange in the child.js file, line 100, in the 'Drupal.modalFrameChild.behaviors.parseLinks' function where URLs are processed to change their target attribute to '_new' if they are external.
but this function also sets to '_new' the attributes of the internal links I display via my module when it could be very useful to include the possibility to change this to '_parent'.
And using the 'modalframe-exclude' class sets them to '_self'.
Although I'm way a noob in module development maybe adding the possibility to use a new css class would extend this :

if ($(this).hasClass('modalframe-parentlink')) {
       $(this).attr('target', '_parent');
    }

could someone explain to me if I'm missing something or if my code would be useful at all?

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