Here is my current hierarchy set up.

I'm trying to use methods such as OnClick() that are called from NGUI (specifically the UICamera I think?) in scripts that are attatched to 2DToolkit animated sprites. However, If i understand it properly, only NGUI objects get sent alterts for things like OnClick() or OnHover().
Is there a script I can attach to the 2D Toolkit sprites to allow them to receive those alerts?