unable to override search-result.tpl.php and search-results.tpl.php

I need to override the  search-result.tpl.php and search-results.tpl.php files from the core search module and am not having any luck.
I have an existing drupal theme (http://drupal.org/project/pixture_reloaded) with custom search results display which works great...the problem is that it doesn't look as good as the St Octivan Theme... so I am trying to switch it but I can't seem to override the search files mentioned above.
I guess I am confused on where to copy the search-result.tpl.php and search-results.tpl.php files. Do I copy these files to the /sites/all/themes/sttheme/octavin/templates or to the /sites/all/themes/sttheme/fusion_core directory?  BTW I copied these files into both directories, cleared cache .... but nothing!!!!  What am I missing..please help.
I really need to get this working otherwise I won't be able to use the great theme you've provided.
Thank you for your help.
Ceci
 
P.S. The existing search-result.tpl.php under the sites/all/themes/sttheme/fusion_core doesn't seem to be working either. For testing purposes I added some text THIS IS A TEST!!!!!!!!! to the search-result.tpl.php file and don't see anything.
<div class="search-result <?php print $search_zebra; ?>">
  <dt class="title">
    <a href="<?php print $url; ?>"> THIS IS A TEST!!!!!!!!! <?php print $title; ?></a>
  </dt>
  <dd>
    <?php if ($snippet) : ?>
    <p class="search-snippet"><?php print $snippet; ?></p>
    <?php endif; ?>
..........