public function deleteVersions($id)
    {
        # Remove all versions of the picture
        $pictures = $this->find(
            'all',
            array(
                'conditions' => array(
                    'Picture.main_id' => $id
                )
            )
        );

        if (count($pictures)) {
            foreach ($pictures as $pic) {
                # Remove file
                if (unlink($pic['Picture']['path'])) {
                    # Remove from database
                    $this->delete($pic['Picture']['id'], array('callback' => false));
                }
            }
        }

        return true;
    }