First You need to backup you file!!!!! Don't cry if you dont 
Following coding will make your Home Login Top Navbar under the Logo and top of the white space u mention
first open includes\templates\acme\template_default\common\tpl_header.php
Find and use CUT following code (Before cut the code delete the red text):
Code:
<!--bof-header logo and navigation display-->
<?php
if (!isset($flag_disable_header) || !$flag_disable_header) {
?>
<div id="headerWrapper">
<!--bof-navigation display-->
<div id="navMainWrapper">
<div id="navMain">
<ul class="back">
<li><?php echo '<a href="' . HTTP_SERVER . DIR_WS_CATALOG . '">'; ?><?php echo HEADER_TITLE_CATALOG; ?></a></li>
<?php if ($_SESSION['customer_id']) { ?>
<li><a href="<?php echo zen_href_link(FILENAME_LOGOFF, '', 'SSL'); ?>"><?php echo HEADER_TITLE_LOGOFF; ?></a></li>
<li><a href="<?php echo zen_href_link(FILENAME_ACCOUNT, '', 'SSL'); ?>"><?php echo HEADER_TITLE_MY_ACCOUNT; ?></a></li>
<?php
} else {
if (STORE_STATUS == '0') {
?>
<li><a href="<?php echo zen_href_link(FILENAME_LOGIN, '', 'SSL'); ?>"><?php echo HEADER_TITLE_LOGIN; ?></a></li>
<?php } } ?>
<?php if ($_SESSION['cart']->count_contents() != 0) { ?>
<li><a href="<?php echo zen_href_link(FILENAME_SHOPPING_CART, '', 'NONSSL'); ?>"><?php echo HEADER_TITLE_CART_CONTENTS; ?></a></li>
<li><a href="<?php echo zen_href_link(FILENAME_CHECKOUT_SHIPPING, '', 'SSL'); ?>"><?php echo HEADER_TITLE_CHECKOUT; ?></a></li>
<?php }?>
</ul>
</div>
<div id="navMainSearch"><?php require(DIR_WS_MODULES . 'sideboxes/search_header.php'); ?></div>
<br class="clearBoth" />
</div>
<!--eof-navigation display-->
Find: (delete the red text)
Code:
<?php } // no HEADER_SALES_TEXT or SHOW_BANNERS_GROUP_SET2 ?>
</div>
<br class="clearBoth" />
<!--eof-branding display-->
<!--eof-header logo and navigation display-->
Paste the code you just CUT after
Code:
<!--eof-branding display-->
<!--eof-header logo and navigation display-->
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