Nextgen Gallery width problem

Hi,

I installed that plugin to display pictures on my website but a little thing that I would like to solve is the width of the picture gallery I would like it to go from side to side if my page. can someone help thanks here is the link to the page in case you want to see: http://voyagesprp.byethost10.com/?page_id=49

and here is the code:

/* ----------- Gallery style -------------*/

.ngg-galleryoverview {
	overflow: hidden;
	margin-top: 10px;
	width: 100%;
	clear:both;
	display:block !important;
}

.ngg-galleryoverview .desc {
/* required for description */
   margin:0px 10px 10px 0px;
   padding:5px;
}

.ngg-gallery-thumbnail-box {
	float: left;
}

.ngg-gallery-thumbnail {
	float: left;
	margin-right: 0px;
	text-align: center;
}

.ngg-gallery-thumbnail img {
	background-color:#FFFFFF;
	border:1px solid #A9A9A9;
	display:block;
	margin:4px 0px 4px 0px;
	padding:4px;
	position:relative;
}

.ngg-gallery-thumbnail img:hover {
	background-color: #A9A9A9;
} 

.ngg-gallery-thumbnail span {
	/* Images description */
	font-size:90%;
	padding-left:5px;
	display:block;
}

.ngg-clear {
	clear: both;
}