One way to do this:
in your css file:
Code:
TABLE.Container { width: 960px; margin-left: auto; margin-right: auto; background-color: #FFFFFF; }
By using margin-left: auto and margin-right: auto, whatever is NOT specified for the container width is essentially centered.
Try it with a low width setting (800)- then try it with 960 (which is great for a 1024 screen).
Helpful?