does your theme include any search.php or searchform.php files?
if so, you can call to them
in header.php I have
<div id="search">
<?php include (TEMPLATEPATH . "/searchform.php"); ?>
</div>
(obviously #search is styled in my css)
which calls to a file called searchform.php which simply includes:
<form method="get" id="searchform" action="<?php bloginfo('home'); ?>" style="padding:0px 0px 0px 0px; margin:0px 0px 0px 0px">
<input type="text" name="s" id="s" value="<?php echo wp_specialchars($s, 1); ?>"/><input class="input" type="image" src="<?php bloginfo('stylesheet_directory'); ?>/images/search.png" value="submit" style="border:0px"/>
</form>
(note that that exact code wouldn’t necessarily work for you, as it references an image, search.png, in my themes images folder)
the results are displayed in my search.php
I am using BFA roundtabs and had to replace the search.php.
Thanks!