default osclass s_zip field help

[lucky_strike]

to enable s_zip field in user registration , and item location   have to edit item_processing ,item.form.class,user.form.class..?
 is there a  shorter way to do that ?

[mmcsus]

Admin--> listing--> custom fields

[lucky_strike]

y dont want  to reinvent the wheel...  yve write a plugin. to insert it in  a new table... or  y can change  to insert into item location table
but y wanna use default s_zip field defined by osclass..
 how to enable it.. and how to process the field...
 the s_zip field 

 defined in osclass/model/ItemLocation.php
* Set data related to t_item_location table
         */
        function __construct()
        {
            parent::__construct();
            $this->setTableName('t_item_location') ;
            $this->setPrimaryKey('fk_i_item_id') ;
            $array_fields = array(
                'fk_i_item_id',
                'fk_c_country_code',
                's_country',
                's_address',
                's_zip',
                'fk_i_region_id',

[lucky_strike]

or how to display the custom field  in item location by default... when installing  a new plugin

[lucky_strike]

solved
http://forums.osclass.org/general-help/did-someone-enable-default-s_zip-field/msg38990/#msg38990