[Request] Galleria plugin

As an alternative:
How can I change WP to give me a different Gallery in a post?

Today we have:

<div class='gallery'>

  <dl class='gallery-item'>
    <dt class='gallery-icon'>
      <a href='URL for full image' title='Title for image'><img src="URL for Thumb"
      width="150" height="150" class="attachment-thumbnail" alt="" /></a>
    </dt>
  </dl>

  <dl class='gallery-item'>
    <dt class='gallery-icon'>
      <a href='URL for full image' title='Title for image'><img src="URL for Thumb"
      width="150" height="150" class="attachment-thumbnail" alt="" /></a>
    </dt>
  </dl> 

  <dl class='gallery-item'>
    <dt class='gallery-icon'>
      <a href='URL for full image' title='Title for image'><img src="URL for Thumb"
      width="150" height="150" class="attachment-thumbnail" alt="" /></a>
    </dt>
  </dl>

<br style='clear: both;' />
</div>

I want this output:

<div class="gallery">
<ul class="gallery-itens">
    <li><img src="URL for full image" alt="Alt for image" title="Title for image"></li>
    <li><img src="URL for full image" alt="Alt for image" title="Title for image"></li>
    <li><img src="URL for full image" alt="Alt for image" title="Title for image"></li>
    <li><img src="URL for full image" alt="Alt for image" title="Title for image"></li>
    <li><img src="URL for full image" alt="Alt for image" title="Title for image"></li>
</ul>

</div>

Could you tell me which PHP handles the 2.5 WP gallery? Maybe I could edit it to create the markup I need.

Tks.

I too am wanting to know this. Effectively you could use WordPress to create things like this site. Basically a page or post with a set of images added to it, output as an unordered list. Anyone know how?