I have mine removed... country, city and zipcode. Here's how I do it...
modules/boonex/groups/classes/BxGroupsFormAdd.php
red = add this to comment out
/*'country' => array(
'type' => 'select',
'name' => 'country',
'caption' => _t('_bx_groups_form_caption_country'),
'values' => $aCountries,
'required' => false,
/*'checker' => array (
'func' => 'preg',
'params' => array('/^[a-zA-Z]{2}$/'),
'error' => _t ('_bx_groups_form_err_country'),
),*/
/*'db' => array (
'pass' => 'Preg',
'params' => array('/([a-zA-Z]{2})/'),
),
'display' => true,
),*/
/*'city' => array(
'type' => 'text',
'name' => 'city',
'caption' => _t('_bx_groups_form_caption_city'),
'required' => false,
/*'checker' => array (
'func' => 'length',
'params' => array(2,50),
'error' => _t ('_bx_groups_form_err_city'),
),*/
/*'db' => array (
'pass' => 'Xss',
),
'display' => true,
),*/
/*'zip' => array(
'type' => 'text',
'name' => 'zip',
'caption' => _t('_bx_groups_form_caption_zip'),
'required' => false,
/*'checker' => array (
'func' => 'avail',
'error' => _t ('_bx_groups_form_err_zip'),
),*/
/*'db' => array (
'pass' => 'Xss',
),
'display' => true,
),*/
cheers,
Audanbal