admin/template/goods_list.htm中找到

      {if $add_handler}
        |
        {foreach from=$add_handler item=handler}
        <a href="{$handler.url}&goods_id={$goods.goods_id}" title="{$handler.title}"><img src="images/{$handler.img}" width="16" height="16" border="0" /></a>
        {/foreach}
      {/if}

   它的下面加入

	  <a href="comment_manage.php?act=list&goods_id={$goods.goods_id}" title="评论管理"><img src="images/icon_title.gif" width="14" height="13" border="0" alt="评论管理"></a><!-- by neo -->

修改admin/comment_manage.php
找到

$where = (!empty($filter['keywords'])) ? " AND content LIKE '%" . mysql_like_quote($filter['keywords']) . "%' " : '';

   它的下面加入

    /** by neo **/  
	$filter['goods_id'] = (is_numeric($_REQUEST['goods_id']) && $_REQUEST['goods_id'] > 0) ? intval($_REQUEST['goods_id']) : 0;  
	if($filter['goods_id'] > 0) {  
		$goods_id = intval($_REQUEST['goods_id']);  
		$where .= " AND id_value = '$goods_id' ";  
	}  
	/** by zuimoban **/

另外为了删除后跳转回当前商品的评论
修改模板 admin/templates/comment_list.htm
找到

<form method="POST" action="comment_manage.php?act=batch_drop" name="listForm" onsubmit="return confirm_bath()">

   它的下面加入

<input name="goods_id" value="{$filter.goods_id}" type="hidden"><!-- by neo -->

修改admin/comment_manage.php  2处

$link[] = array('text' => $_LANG['back_list'], 'href' => 'comment_manage.php?act=list'

        修改成

$link[] = array('text' => $_LANG['back_list'], 'href' => 'comment_manage.php?act=list'.'&goods_id='.$_REQUEST['goods_id']);//by neo