In Atahualpa -> style images, this code:

.post img {
	border: 1px solid #005297;
text-align: center;
background-color: #005297;
padding: 4px 4px 4px 4px;
margin: 0px 0px 0px 5px;
moz-box-shadow: 1px 1px 10px #00f;
-moz-border-shadow: 30pc;
-khtml-border-radius: 10px;
-webkit-border-radius: 10px;
border-radius: 10px;
-webkit-box-shadow: 5px 5px 0px 0px #c5d0e0;
-moz-box-shadow: 5px 5px 0px 0px #c5d0e0;
box-shadow: 5px 5px 0px 0px #c5d0e0;}

(change colour and 5px as needed)

In Atahualpa -> css inserts, this code:

.customImage img {
padding: 0px;
border: none;
background: none;
-moz-border-radius: 0px;
-khtml-border-radius: 0px;
-webkit-border-radius: 0px;
border-radius: 0px;
-webkit-box-shadow: 0px 5px 0px 0px #c5d0e0;
-moz-box-shadow: 0px 0px 0px 0px #c5d0e0;
box-shadow: 0px 0px 0px 0px #c5d0e0;}

(then whenever you dont want an image to have a border you do <div id="customImage"><img src="image.png"></div>