For those that want this feature, use the enclosed yanc.php in place of the default one. It only adds the text CHECKED to line 83, but that seems to do the trick. The path for the file is:
components/com_comprofiler/plugin/user/plug_yancintegration
Just got around to updating my site to the latest version of CB, and the old method I posted previously is indeed broken. So I poked around and figured out how to fix it again.