in monobook.php change :
<h1 class="firstHeading"><?php
$this->text('title') ?></h1>
into
> <?php if($this->haveData('title') !=
wfMsgForContent('mainpage')){ ?>
<h1 class="firstHeading"><?php
$this->text('title') ?></h1>
> <?php } ?>
How make this affects 'Main Page' and 'Main Page/Page 1', 'Main
Page/Page
2', etc?