Using Gallery2's Embed API

Embed sample index ⟐ Embed template ⟐ Simple embed tool
Connect w/ Gallery2 
<?php
    require_once ('/usr/local/www/public_html/gallery2/embed.php'); // Path to Gallery's embed.php
    $ret = GalleryEmbed::init(array('g2Uri'=>'http://www.flashyourweb.com/gallery2/main.php', 'embedUri'=>'http://www.flashyourweb.com/gallery2/embed_samples/g2_html_segments_example.php', 'fullInit'=>'false'));
    if ($ret) {
        print $ret->getAsHtml();
    }
    $gallery->setConfig('showSidebarBlocks', false); // you can hide the sidebarblocks in fact you must to use $g2data['sidebarBlocksHtml']
    $gallery->setConfig('login', true); // you can allow for login if you want
    $gallery->setConfig('defaultAlbumId', 32); // set the default home album
    $ret = GalleryEmbed::setThemeForRequest('matrix');
    if ($ret) {
        print 'Failed to set theme'.$ret->getAsHtml();
    }
    $g2data = GalleryEmbed::handleRequest();
    if ($g2data['isDone']) {
        exit;
    }
    GalleryEmbed::done();
?>
<?php echo $g2data['headHtml']; ?> 
<link rel="stylesheet" type="text/css" href="/gallery2/main.php?g2_view=imageframe.CSS&g2_frames=shadow"/>

<title>Slideshow</title>
<link rel="stylesheet" type="text/css" href="/gallery2/modules/core/data/gallery.css"/>
<link rel="stylesheet" href="/gallery2/modules/slideshow/data/lytebox.css" type="text/css" media="screen"/>
<link rel="stylesheet" type="text/css" href="/gallery2/modules/icons/iconpacks/silk/icons.css"/>
<script type="text/javascript" src="/gallery2/main.php?g2_view=slideshow.DownloadPicLens&g2_file=js&g2_v=1.3.1.14221"></script>
<script type="text/javascript" src="http://www.flashyourweb.com/gallery2/main.php?g2_view=core.CombinedJavascript&g2_key=f53fc8a016c79bc5e94d0f023f236fc5"></script>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
<link rel="stylesheet" type="text/css" href="/gallery2/themes/matrix/theme.css"/>
$g2data['sidebarBlocksHtml']

Requires $gallery->setConfig('showSidebarBlocks', false); as seen above.

Basically you would only use this if you were planning on placing your sidebar in a specific location in your layout. Otherwise the sidebar is included in bodyHtml.

<?php
    if(isset($g2data['sidebarBlocksHtml'])){
        foreach ($g2data['sidebarBlocksHtml'] as $snippet) {
            echo $snippet;
        }
    }
?>
<?php echo $g2data['bodyHtml']; ?>