Struggling to apply NGUI to Top-down RPG camera

Hi all,

I am using an action RPG camera asset with NGUI. I basically am trying to put my health/mana/task bar in static in front of the screen and have the inventory and skills menus hot-key'd. So I have two questions:

1) I'm where to put the health/mana/task bar. Which camera? Do I child it to a camera? Struck on this.

2) the skills/inventory/other menus... where do they go?