Complex Button Rollover Menu

Can you put a complex rollover button inside another complex rollover? If so, how do you do so?

Such as putting a complex rollover button inside a complex rollover that acts more like a menu than a button…

Here are some examples of what I’m looking to do…

http://www.verragio.com/#section=0&sub=0

http://www.bullrot.com/main.html

(im looking to make a menu that when you rollover a arrow it moves into view, then has rollover buttons that have a nice effect when you rollover those as well…)