Create a textarea in admin/Customers?

[southpacific]

How do I insert a textarea in admin/customers

I have created a new field called customers_comments and have made all changes necessary changes to ../admin/customers.php except the actual field/textarea "command", I'm not so sure how to add this.

I tried

<?php
  if ($processed == true) {
    echo $cInfo->customers_comments . zen_draw_hidden_field('customers_comments');
  } else {
     echo zen_draw_textarea_field('customers_comments', 'soft', '60', '5');
  }
?>

Am I missing something?

Many Thanks in advance...