placing a single picture (using mgSolo)

I wasn’t using anything to display the images, just standard HTML. I was wondering if I could simply modify the lightbos JS file to choose a filename that is a variation of the listed src file. The thumbnails are named xxxx_small.jpg, and I want the large ones to use xxxx.jpg

So... you are not using any snippets? Just asking how to use Lightbox js by itself?

Well.. in that case just add lightbox js scripts to your site template head:

<script type="text/javascript" src="assets/js/prototype.js"></script>
<script type="text/javascript" src="assets/js/scriptaculous.js?load=effects,builder"></script>
<script type="text/javascript" src="assets/js/lightbox.js"></script>

Then include Lightbox css:

<link rel="stylesheet" href="assets/css/lightbox.css" type="text/css" media="screen" />

Then create a link to your picture with a thumbnail:

<a href="this_is_the_path_to_the_image_that_is_opened_in_lightbox/image.jpg" rel="lightbox" title="caption text">
  <img src="this_is_the_thumbnail_that_is_shown_in_your_page/thumb.jpg" />
</a>

Or did I understood something wrong? Of course you would have found all this info in lightbox homepage. http://www.huddletogether.com/projects/lightbox2/

Actually, I didn’t read the directions all the way through.
I thought lightbox only used a single image source.
I didn’t realize the link and the thumbnail used a different image. Thanks for your help!