Stuff

OK, I found how to show only on home page the header banner:

Edit /admin/view/template/module/banners.tpl

Find    <?php if ($banners_position == 'header') { ?>
			  <option value="header" selected="selected"><?php echo $text_header; ?></option>
			  <option value="home">Home</option>

			  <?php } else { ?>
			  <option value="header"><?php echo $text_header; ?></option>
<?php } ?>

Replace all with:

<option value="header" ><?php echo $text_header; ?></option>
<option value="home" selected="selected">Home</option>

Now we have two option to select.

Also you need to edit: 				

/catalog/controller/module/banners.php

change:
if ($this->config->get('banners_position') == 'header') {

to:
if ($this->config->get('banners_position') == 'home') {

Voila!! :)