I haven't viewed there website but for a box all you need to do is add a
div tag and then add a ID or Class to it and then use a CSS selector, mines the bare minimum so you can style the CSS yourself.
HTML Code:
<div id="bob"
Content Here
</div>
Then for the CSS.
Code:
#box {
width: 200px;
height: 200px;
border: 1px border_stuff;
padding: whatever padding you want;
}
You will have to style it yourself, to make the box do what you want it to do but thats the basic structure of what you could do.