MenuItem with right aligned image

I am trying to add a small arrow image to the right side of a submenu item.  The best I have found so far is to float:right on the 'img' tag in css.  However, since the right side of the menu item is wherever the text stops, I cannot get it to stop overlapping the text no matter what padding or margins I use.  I would think this would be a simple image align right somewhere on the menuitem.  Here is an example:
<Items> <asp:MenuItem NavigateUrl="~/frmForms.aspx" Value="Forms" Text="Forms"> <asp:MenuItem NavigateUrl="~/frmForms.aspx" Value="" Text="Text Here" ImageUrl="pics/menuArrowWhite.png"></asp:MenuItem> <asp:MenuItem Text="Overview" Value="Overview"></asp:MenuItem> </asp:MenuItem> Is this possible without writing a custom menu?  Thanks!