步骤1.打开includes\modules\shipping文件夹，把sto_express.php复制多一份，重名为tt_express.php；

 步骤2.打开tt_express.php，ctrl+F调出“查找替换框”将所有“sto_express.php”替换成“tt_express.php” ，所有“申通快递”替换成“天天快递”； 

步骤3.打开languages\zh_cn\shipping文件夹，把sto_express.php复制多一份，重命名为tt_express.php；

步骤4.再将打开我们重命名好的tt_express.php，ctrl+F调出“查找替换框”将所有“sto_express.php”替换成“tt_express.php” ，所有“申通快递”替换成“天天快递”（说明：步骤3.4是创建中文语言包，如果需要创建英文和繁体的语言包，请自行打开languages\en_us\shipping和languages\zh_tw\shipping进行步骤3.4的操作）

步骤5.Includes/inc_constant.php第237行加上相应如“|tt_express”

==原程序为：

/* 配送方式 */

define('SHIP_LIST', 'cac|city_express|ems|flat|fpd|post_express|post_mail|presswork|sf_express|sto_express|yto|zto');

==修改后程序为：

define('SHIP_LIST', 'cac|city_express|ems|flat|fpd|post_express|post_mail|presswork|sf_express|sto_express| tt_express|yto|zto');

步骤6. admin\templates\shipping_area_info.ht第12行加上相应如“|| $shipping_area.shipping_code =='tt_express'”

==原程序为：

{if $shipping_area.shipping_code =='ems' || $shipping_area.shipping_code =='yto' || $shipping_area.shipping_code =='zto' || $shipping_area.shipping_code =='sto_express' || $shipping_area.shipping_code =='post_mail' || $shipping_area.shipping_code =='sf_express' || $shipping_area.shipping_code =='post_express' }

==修改后程序为：

{if $shipping_area.shipping_code =='ems' || $shipping_area.shipping_code =='yto' || $shipping_area.shipping_code =='zto' || $shipping_area.shipping_code =='sto_express' || $shipping_area.shipping_code =='post_mail' || $shipping_area.shipping_code =='sf_express' || $shipping_area.shipping_code =='tt_express' ||$shipping_area.shipping_code =='post_express' }

步骤7. 进入后台更新网站缓存，完成插件添加。

注意：中文部分的物流价格什么的，请自行另外修改。