Maybe I'm missing something obvious, but I'm having a heck of a time getting DNNNav (core Navigation w/ 5.2+) to display in this way. Bascially, I'm trying to get the sub-menus to appear centered under the top-level item. I've tried negative margins, however that only seems to work best with defined-width submenus, and it seems that the first / last items seems to align a bit 'shifted in'  - the first item's submenu renders shifted to the right a bit, and the last item's submenu renders a bit shifted to the left (in a horizontal, right-to-left menu). Images are linked below:

Currently:

Ideally:

Current Menu CSS:

.MainNav {
	font-family: Verdana, sans-serif;
	font-size: 12px;
	line-height: 21px;
	height: 21px;
	width: 980px;
	padding-bottom: 3px;
	padding-top: 4px;

}


.MainNav .mi {
	margin-left: 15px;
	margin-right: 15px;
	padding-bottom: 2px;
	padding-top: 4px;
	padding-left: 5px;
	padding-right: 5px;
	border-left: 1px solid #FFFFFF;
	border-right: 1px solid #FFFFFF;
}



.MainNav .hov {
	color: #F57B20;
	border-left: 1px solid #CCCCCC;
	border-right: 1px solid #CCCCCC;
	border-bottom: 1px solid #FFFFFF;
}

.MainNav .m {
	background-color:#FFFFFF;
	border:1px solid #CCCCCC;
	width: 200px;
	padding: 5px;
}

.MainNav .m .hov {
	background-color: #ccc;
	color: #002B54;
}