Where did you get the javascript for your demo horizontal menu athttp://www.puntoflotante.com/tests/tema.html ?
It looks good, and is certainly a solid first step towards
getting away from the screen real estate hogging sidebar block menus.
Gamut
Enterprise-X is a professional corporate/organization presentation module,
it allows you to easily present your organization: what you do, how you do it well, price info, testimonies, case studies, etc...,
with full customizable layout.
A beta version will be released soon including a set of templates designed by IMAGO (http://www.Imagocn.net/theme/)