Help with customization

[afo]

Yes, a lot of that can be done in the stylesheet. Take a peek at http://(sorry, site offline)/ to see the free templates available for Zen Cart. If you find one you like you can use it for your site or use it as a guideline to create your own template.

[stevesh]

Specifically, the box headers can be changed here in the stylesheet:

.leftBoxHeading, .centerBoxHeading, .rightBoxHeading {
margin: 0em;
background-color: #abbbd3;
background-image: url(../images/tile_back.gif);
padding: 0.5em 0.2em;
}

Change the background-image to yours, if you want them all the same.

If by invisible, you mean no borders,

.leftBoxContainer, .rightBoxContainer {
margin: 0em;
border: 1px solid #9a9a9a;
border-bottom: 5px solid #336633;
margin-top: 1.5em;
}

set the border to 0px.