Need help modifying the Neat! theme

Hi

I’m fooling around with the Neat theme, I want to use it and add some functionality to it.

I’m going to be modifying the Sidebar, heavily.

And I need the header modified too, maybe CSS I don’t know. (and don’t know how to)

The thing is I need a Horizontal menu line, with 3 menu items: Nyheder, Bio and Kontakt (it’s danish)
When one of the menu items are clicked I need a horizontal submenu to appear. The submenu items are going to link to pages (not posts).

Can anyone please help me? If you can recomend me another theme this will be OK too, as long as there is a picture in the header that can be modified.

The Sub menu items are the following:
Nyheder
– Generelt
– Koncerter
Bio
– Bandet
– Billeder
– Repertoire
Kontakt
– Oplysninger
– Gæstebog

I hope some one can/will help me out.