need help please finding the center box wrapper

[graphx]

Hello, Hope everyone is doing great. I'm using Zen Cart 1.3.7 and I can't figure out where the center box wrapper in my stylesheet.css is at which I got from the default_template not classic. The sytlesheet.css is now in my custom folder. As you can see below the center box wrapper is not there it should be below all the list box content. I wanted to add an image to my main page. Also, how would i add an image in the center of the main page of my store.

I greatly appreciate your time.:

/*list box contents*/
.centerBoxContents, .specialsListBoxContents, .categoryListBoxContents, .additionalImages, .centerBoxContentsSpecials, .centerBoxContentsAlsoPurch, .centerBoxContentsFeatured, .centerBoxContentsNew {
margin: 1em 0em;
}



/*sideboxes*/
.columnLeft {}

[Ryk]

URL please