Noob question - jquery.js not allowing a plugin to work

Noob question - jquery.js not allowing a plugin to work

I'm using artisteer to generate a web template.  It uses the jquery.js to manage the top horizontal menu bar.  I'm trying to utilize the "plugin" PicasaViewer 2.0
Its not working.  I've trouble shot it down to the jquery.js line of code.  If I remove it, Picasaviewer works fine but I loose some formatting to the menu bar.  If I keep the jquery in, the plugin doesn;t "grab" the photo galleries from my picasa account.  I can't even begin to understand the jquery script and am wondering if someone could point the issue out...
Here's the basic working code of the plugin, not using any of artisteer's additional code:
  2. <html lang="nl">
  3.         <head>
  4.                 <title>PicasaViewer 2.0 for mootools - picasa en tu casa</title>
  5.                 <link  type="text/css"  rel="stylesheet"  media="screen"  charset="utf-8"  href="css/style.css" />
  6.                 <link  type="text/css"  rel="stylesheet"  media="screen"  charset="utf-8"  href="css/slimbox.css" />
  7.                 <link  type="text/css"  rel="stylesheet"  media="screen"  charset="utf-8"  href="css/picasaViewer.css" />
  8.                 <script type="text/javascript" src="js/mootools-core-1.4.0-full-compat-yc.js"></script>
  9.                 <script type="text/javascript" src="js/mootools-more-1.4.0.1.js"></script>
  10.                 <script type="text/javascript" src="js/slimbox.js"></script>
  11.                 <script type="text/javascript" src="picasaViewer2.0.js"></script>
  12.         </head>
  13.         <body>
  14.                 <div id="content-container">                        
  15.                         <h1>PicasaViewer</h1>
  16.                         <div id="navigate"></div>
  17.                         <div id="photos"></div>
  18.                 </div>
  19.         </body>
  20. </html>
And here is my website URL where its not working to much code to post but look at line 13:

Like I said, if I remove the jquery.js source (line 13 on the website) PicasaViewer works but nav bar formatting is gone.
Hoping im in the right place to ask this question.
Thanks

UPDATE-
Like I said, I'm a noob.  While waiting and researching I'm learning more.  I now believe I'm in the wrong place.  At least using the wrong code.  I'm using mootools code and not a jquery plugin.  Just found some code for jquery plugin that might work better on (obviously, on the jquery plugin archives).
As I keep learning and researching, any one have anything to add?
May I pose another question?  How is the security on this stuff?  If I use this code am I opening myself up to hacking in the future if I don't stay ontop of this little bit of code I add?
And remember, patience is a virtue, and not flaming a noob is godly!