Ciao anilina. Se proprio vuoi fare così devi aprire la tua index.php e tagliare questa parte ci codice:
<?php if($this->countModules('user1 or user2')) : ?>
<table class="nopad user1user2">
<tr valign="top">
<?php if($this->countModules('user1')) : ?>
<td>
<jdoc:include type="modules" name="user1" style="xhtml" />
</td>
<?php endif; ?>
<?php if($this->countModules('user1 and user2')) : ?>
<td class="greyline"> </td>
<?php endif; ?>
<?php if($this->countModules('user2')) : ?>
<td>
<jdoc:include type="modules" name="user2" style="xhtml" />
</td>
<?php endif; ?>
</tr>
</table><?php if($this->countModules('user1 or user2')) : ?>
<table class="nopad user1user2">
<tr valign="top">
<?php if($this->countModules('user1')) : ?>
<td>
<jdoc:include type="modules" name="user1" style="xhtml" />
</td>
<?php endif; ?>
<?php if($this->countModules('user1 and user2')) : ?>
<td class="greyline"> </td>
<?php endif; ?>
<?php if($this->countModules('user2')) : ?>
<td>
<jdoc:include type="modules" name="user2" style="xhtml" />
</td>
<?php endif; ?>
</tr>
</table>
<div id="maindivider"></div>
<?php endif; ?>
e incollarla sempre dentro la tua index.php subito dopo questo codice:
<table class="nopad">
<tr valign="top">
<td>
Ma, ripeto, quei due box stanno mmeglio come sono disposti adesso...