Drop-down, fly-out menu

Help! I've reached a dead-end in my understanding of how to do things in customization and I'm getting frustrated people. I'm building a site from scratch rather than converting a legacy site. I've looked at half a dozen video tutorials but I'm now stuck. I originally sketched out how I want my site to function and then looked at dozens of sites to find something close. Here is the site that I'd like to model mine on: http://www.setoien.com
Here is my start: http://PaulOsgood.smugmug.com
I've only put in stubs for the pages and galleries. Once I get it working I'll invest more time in filling these out. The part of the design I'm looking at resolving is the drop-down, fly-out menu. I've read the help page (http://help.smugmug.com/customer/por...avigation-menu) but I must be thick as I'm not getting it. In the Organize panel I've built the hierarchy I want and it seems to be working, at least for the Galleries. I've populated it with just a few galleries and will add many more when I get it working.
Also I can't seem to place the top banner all the way to the left. The positioning of the placement areas does not seem to allow it.
I'd be grateful for any advice you can provide.

Thanks,
Paul