Change upload path for specific file_upload field 2

Hey guys,

I would have replied to the previous thread, but it was closed...

I'm trying to hijack the form POST to change the file upload path of one field. Just before submission, I can get the path to change properly, but I'm assuming after it posts, the upload path is hijacked again by the form.

Here's what I have so far:

add_action('gform_post_data_1', 'ebooks_review_book', 10, 2);
	function ebooks_review_book($form) {

		$img    = $form['images'][0]['url'];
		$img    = explode('/', $img);
		$img    = $img[sizeof($img)-1];

		$form['images'][0]['url']                    = content_url() . '/uploads/books/' . $img;

		echo "<pre>";
		print_r( $form );
		echo "</pre>";

		exit;
		//return $form;
	}

Is there a hook I can use to make this work? One that runs after change_upload_path, but before the file is actually moved?

Thanks,
jacob