Has anyone managed to get a sidebox into this CSS mega-menu?

I've been trying to add the advanced search box into a dropdown and if I can get that done, I'd also like to have the shopping cart sidebox in another dropdown.

Has anyone got any ideas?

Excellent script by the way, and highly recommended if you haven't tried it.

Currently in action at www.thefabulousdogcompany.com

Cheers

Kristian