Ahh... =)
ok,
first you need to turn menu options on.
(second panel.. options button)
then make the menu background transparent (paste in transparent image)
then create your Aqua menu items (caps, and fills)
the caps are as follows:
1 active L
2 active R
3 mouse over L
4 mouse over R
5 inactive L
6 inactive R
the fills are:
1 active
2 mouse over
3 inactive