HTML - Getting Horizontal Menu To Not Wrap.

Hi folks, I have this menu (generated via menumatic), that needs to not wrap should users decrease the width of their browser too far (or if it does wrap..then I need the div to resize to fit the height properly which it currently does not).

Any tips/suggestions welcome

The website url: (click the Available Items which will show the 2nd level menu in question (located in div id='promo')
http://www.borrownet.com/


the CSS is as follows (from mm2.css):
/* Based partially on Matthew Carroll's keyboard accessible flavor of Suckerfish
* Dropdowns by Patrick Griffiths and Dan Webb.
* http://carroll.org.uk/sandbox/suckerfish/bones2.html
*/

/* ----[ LINKS ]----*/

/* all menu links */
#nav a, #subMenusContainer a{
text-decoration:none;
display:block;
padding: 8px 10px;
color: #000;
font: 70%/90% arial;
-moz-border-radius: 4px;
-webkit-border-radius: 4px;
}

/* Just main menu links --[for non-javascript users this applies to submenu links as well]*/
#nav a{
margin:5;
float:left;
}

/* Just sub menu links */
#subMenusContainer a, #nav li li a{
text-align:left;
}

/* All menu links on hover or focus */
#nav a:hover,
#subMenusContainer a:hover
{
background-color:#90B557;
color:#FFF;
/* -moz-border-radius: 7px;
-webkit-border-radius: 7px;*/
}

/* sub menu links on hover or focus */
#subMenusContainer a:hover,
#nav li a:hover
{
background-color:#B2D281;
color:#000;

}

/*
.subMenuParentBtn{
background: url(../img/arrow_right.gif) right center no-repeat;
}


.subMenuParentBtnFocused{
background: url(../img/arrow_right_over.gif) right center no-repeat;
}


.mainMenuParentBtn{
background: url(../img/arrow_down.gif) right center no-repeat;
}


.mainMenuParentBtnFocused{
background: url(../img/arrow_down_over.gif) right center no-repeat;
}
*/
/* ----[ OLs ULs, LIs, and DIVs ]----*/

/* Submenu Outer Wrapper - each submenu is inside a div with this class - javascript users only */
.smOW{
display:none;
position: absolute;
overflow:hidden;
/*the 2px left & right padding lets you have a 1px border
on the ul or ol inside since overflow is set to hidden*/
padding:0px 4px;
margin:0 0 0 -2px;
}


/* All ULs and OLs */
#nav, #nav ul, #nav ol, #subMenusContainer ul, #subMenusContainer ol {
padding: 0;
margin: 0;
list-style: none;
line-height: 1em;
}

/* All submenu OLs and ULs */
#nav ol, #nav ul, #subMenusContainer ul, #subMenusContainer ol {
/*border around submenu goes here*/
-moz-border-radius: 4px;
-webkit-border-radius: 4px;
background-color:#90B557;
border: 2px solid #C3D46A;
top: 0px;
left:0;
z-index:8;
}


/* List items in main menu --[for non-javascript users this applies to submenus as well] */
#nav li {
/*great place to use a background image as a divider*/
display:block;
list-style:none;
position:relative;
float:left;
}

#subMenusContainer li{
list-style: none;
}

/* main menu ul or ol elment */
#nav{
display:block;
position: absolute;
list-style:none;
margin:0 0 0 0;
z-index: 5;
text-align: center;
display:block;
}

#subMenusContainer{
display:block;
position:absolute;
top:0;
left:0;
width:100%;
height:0;
overflow:visible;
z-index:1000000000;
}


/* --------------------------[ The below is just for non-javscript users ]--------------------------*/
#nav li li{ float:none; }

#nav li li a{ /* Just submenu links*/
position:relative;
float:none;
}

#nav li ul { /* second-level lists */
position: absolute;
width: 11em;
margin-left: -1000em; /* using left instead of display to hide menus because display: none isn't read by screen readers */
margin-top:2.2em;
}

/* third-and-above-level lists */
#nav li ul ul { margin: -1em 0 0 -1000em; }
#nav li:hover ul ul margin-left: -1000em; }

/* lists nested under hovered list items */
#nav li:hover ul{ margin-left: 0; }
#nav li li:hover ul { margin-left: 10em; margin-top:-2.5em;}

/* extra positioning rules for limited noscript keyboard accessibility */
#nav li a:focus + ul { margin-left: 0; margin-top:2.2em; }
#nav li li a:focus + ul { left:0; margin-left: 1010em; margin-top:-2.2em;}
#nav li li a:focus {left:0; margin-left:1000em; width:10em; margin-top:0;}
#nav li li li a:focus {left:0; margin-left: 2010em; width: 10em; margin-top:-1em;}

#nav li:hover a:focus{ margin-left: 0; }
#nav li li:hover a:focus + ul { margin-left: 10em; }