aynı zamanda eklentinin web sitesinde sidebarda slayt şeklinde gördüm kaynaktan bakıp şöyle bi kod buldum :

<object style="visibility: visible;" id="sbsl1_1" data="http://nextgen-gallery.com/wp-content/uploads/imagerotator.swf" class="slideshow-widget" type="application/x-shockwave-flash" width="160" height="120"><param value="opaque" name="wmode"><param value="file=http%3A%2F%2Fnextgen-gallery.com%2Findex.php%3Fcallback%3Dimagerotator%26gid%3D1&amp;shownavigation=false&amp;shuffle=false&amp;overstretch=true&amp;rotatetime=10&amp;backcolor=0x000000&amp;frontcolor=0xFFFFFF&amp;lightcolor=0xCC0000&amp;screencolor=0xFFFFFF&amp;width=160&amp;height=120" name="flashvars"></object>
<script type="text/javascript" defer="defer">
<!--
//<![CDATA[
var sbsl1_1 = {
    params : {
        wmode : "opaque"},
    flashvars : {
        file : "http%3A%2F%2Fnextgen-gallery.com%2Findex.php%3Fcallback%3Dimagerotator%26gid%3D1",
        shownavigation : "false",
        shuffle : "false",
        overstretch : "true",
        rotatetime : "10",
        backcolor : "0x000000",
        frontcolor : "0xFFFFFF",
        lightcolor : "0xCC0000",
        screencolor : "0xFFFFFF",
        width : "160",
        height : "120"},
    attr : {
        styleclass : "slideshow-widget"},
    start : function() {
        swfobject.embedSWF("http://nextgen-gallery.com/wp-content/uploads/imagerotator.swf", "sbsl1_1", "160", "120", "7.0.0", false, this.flashvars, this.params , this.attr );
    }
}
sbsl1_1.start();
//]]>
-->
</script>        </div>
        </li>

kırmızı bölümler size göre düzenlenecek.