I was looking for
1) Amazon style-on front page full height. On product pages-minimized to button-like - drop down on hoover, slide right on hoover.
2) I'm used to editor you get in templates-see attachement.
3) Also this menu, does not prevent regilar horizontal menu from being present.
4) The bonus part http://bjk5.com/post/44698559168/breaking-down-amazons-mega-dropdown