[SOLVED] Menu transparent and over the header image

Hey guys,
I'm at wits end, I've searched the forum and the web and am having no luck.
Currently the site looks like http://interactivesoundresource.com/orion/

What I want is the menu to sit on top of the header image, be transparent and be to the right. Just like www.supergiantgames.com, I can add the darker gradient to the header image.

And while I'm at it, how do I bring the entire site down by 10-20px?
Any help is hugely appreciated!