[DrQuietus]

I thought there was a security setting, but I couldn't find it so you could just comment out lines 86-91 on /common_files/customer/main/register_account.tpl (or the vivid_dreams tpl you mentioned)

{*
{else}
<tr>
  <td class="data-name">{$lng.lbl_password}</td>
  <td></td>
  <td><a href="change_password.php">{$lng.lbl_chpass}</a></td>
</tr>
*}