Is it possible to control the width of the Rollover menus?  

I have tried experimenting with the css like this:

#nav li.services #subMenusContainer
{width:150px;}

But it seems the submenus are not actually contained within the li after
the javascript gets done with it.

My particular problem comes from a horizontal menu where the "services"
button touches the right hand side of the screen at 1024px wide. The sub
menu that pulls down has text inside that goes off the page. (the sub sub
menus respond correctly by flowing out to the left)  I am trying to
restrict the width of the Services sub menu to 150px.  Is this possible?