Aligning shop center

I'm difinitly a ZC noobie.. what I am trying to do is align my whole shop to the center.
It seems to me after I have searched the forum that it typically does align center by default but for some reason mine has aligned to the left.

Well my current temp location for the store is at http://www.djsguitars.com/cart

here is my current body style

body {
margin: 0px;
font-family: verdana, arial, helvetica, sans-serif;
font-size: 62.5%;
color: #000000;
background-color: #FFFFFF;
width: 818px;

}

You need to define the main wrapper for the centering that's my assumption - your page is not loading for me it keeps timing out so I cannot look at the css or source to help you.

Thank you for your reply!

I dunno why its timing out.. sorry bout dat.

this might be a really dumb question but how would i define that in the mainwrapper.. heres what I have right now..

#mainWrapper {
text-align: left;
width: 100%;
vertical-align: top;
background-image: url(../../../../images/middle.jpg);
background-repeat: no-repeat;
background-color: #ffffff;
}

got it centered!

I just changed my margin in the body tag from margin: 0px to margin: auto

thank you again for your reply, its much appreciated!