Different Logo on one Page?

Hello

Is it possible anyone can tell me how i can alter the code in header.php so that one page has a different logo than the rest of the site?

Any help would be much appreciated.

Thanks

The existing code is:

<div class="logo">
<?php if($custom_settings["logo_text_based"]){ ?>
<h1><a>"><?php echo $custom_settings["logo_text_based"]; ?></a></h1>
<?php }else{ ?>
<a>"><img src="<?php if($custom_settings["logo"]) { echo $custom_settings["logo"]; }else{ echo get_bloginfo('template_directory') . "/images/logo.gif"; } ?>" alt="Logo" /></a>
<?php } ?>
</div>

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