Great tip,  but for me the comment of kmouts is a nice solution, i hacked it to make it appear the help icon in the same col of label and aligned to right:

<script type="text/javascript">
    $(function() {
        $("td.w2p_fc").each(function() {
            var comment = $(this).html();
            var trl = this.parentNode.firstChild;
            if (comment) {
                var text = $(trl).html;
                $(this).html('');
                $(trl).append('&nbsp;<i class="icon info icon-info-sign pull-right"></i>');
                $(trl).children('i').attr('title', comment);
                $(trl).children('i').tooltip({
                    placement : 'top',
                    html : true,
                    trigger : 'click'
                });
            }
        });
    });
</script>