Add/Remove custom fields in WordPress profile

gistfile1

/* =====================================================
	Custom profile field
===================================================== */
function modify_contact_methods($profile_fields) {

	// Add new fields
	$profile_fields['company_name'] = 'Company Name';

	// Remove old fields
	unset($profile_fields['aim']);

	return $profile_fields;
}
add_filter('user_contactmethods', 'modify_contact_methods');