[Simon Lloyd]

put this in your Main Css, additional Css

.tarea { 
position: absolute;
visibility: hidden; 
}

this should replace that portion in your register.php which relates to admin email

<td class="tarea">
<label for="cb_adminemail">
<input type="checkbox" name="options[adminemail]" value="1" id="cb_adminemail" $checkedoff[adminemail] checked="checked" />$vbphrase[receive_email_from_bulletin_board_staff]</label></td>

It should work for you