Hoe do I add a new level to a css drop down menu (it uses 1 horizontal sprites image at the top)

Hi,

I want to add a second level (or fly out ?) to my css menu, but can't figure out how.

ul li ul li ... I am confused!

It uses one horizontal sprites image at the top ... the lower part is just css (no images)

can't figure out how to write the css so it's just repeating the drop down part for the second level.

Menu can be seen here http://vnd-ink.com/Pat/NavTest.html

Thank You!