Simple Controls Gallery v1.3: background image; IE6 control and image issues

[MissKitty]

1) Script Title:
Simple Controls Gallery v1.3

2) Script URL (on DD):
http://www.dynamicdrive.com/dynamicindex4/simplegallery.htm

3) Describe problem:
This script is great but I have a few issues to resolve.

1. I want to show a static background image within the #simplegallery1 div. I found a post on this forum where someone was able to add a background image to the css, so I tried that but it is not displaying. Here is my CSS:

#simplegallery1{ 
position: relative; /*keep this intact*/
visibility: hidden; /*keep this intact*/
border: 10px solid #fc9;
background-image:url(../portfolio/img/archibald_002.jpg);
background-position:center center;
background-repeat: no-repeat;
width: 600px; /* added */
height: 455px; /* added */
}

2. In IE6, my images are displaying about 5px of blank space between the left edge of the image and the border, although it displays fine in FF and IE7. The page is here

3. My controls (first/pause/next) are flush left in the navigation section, rather than centered. Again, the page is here

Thanks so much in advance

[MissKitty]

Nobody can help me out with any of these questions?