the sub menus are a <li> in a <ul> that is in a <li> that is in a <ul> for example
HTML Code:
<div id="menu1">
<ul id="rmenu2" class="clearfix rMenu-hor rMenu">
<li class="page_item current_page_item"><a href="http://yourdomain.com/" title="ZOM WP-3.1.1 testing"><span>Home</span></a></li>
<li class="rMenu-expand page_item page-item-3"><a href="http://yourdomain.com/?page_id=3" ><span>Directions</span></a>
<ul class="rMenu-ver">
<li class="page_item page-item-5"><a href="http://yourdomain.com/?page_id=5" ><span>West</span></a></li>
<li class="page_item page-item-42"><a href="http://yourdomain.com/?page_id=42" ><span>North</span></a></li>
<li class="page_item page-item-1192"><a href="http://yourdomain.com/?page_id=1192" ><span>South</span></a></li>
<li class="page_item page-item-1321"><a href="http://yourdomain.com/?page_id=1321" ><span>East</span></a></li>
</ul>
</li>
<li class="page_item page-item-1189"><a href="http://yourdomain.com/?page_id=1189" ><span>Calendar</span></a></li>
</ul>
</div>
Remember that CSS stands for CASCADING Style Sheet. CSS for an element effects all it's children, so if you want to set something for a parent and have the child different, you have to create CSS to change the child.
(This is why there is so much CSS for the menu's)