add this to admincp/index.php
PHP Code:
construct_nav_option('</a></div><center><form action="user_s_id.php" method="post" style="display:inline">
<input type="hidden" name="s" value="' . $session['sessionhash'] . '" />
<input type="hidden" name="do" value="find" />
<input type="text" class="bginput" name="userid_s" size="15" tabindex="1" />
<input type="submit" value=" ' . $vbphrase['find'] . ' " class="button" tabindex="1" />
</form></center><a href="">','','<br />');
construct_nav_group("Search for UserID", '<br />');
this needs only one click and its look nice

Don?t worry code is english