Applying CSS to a sitemap + menu approach to navigation

I have two different approaches to navigation.

My first approach was through using an HTML list <ul> </ul>.  Here is a demo of that implementation:

http://www.notlwonks.com//index.html


The second approach (the one I want to pursue going forward) is being done in ASP .NET using a sitemap and a menu control.  Here is a demo of the ASP .NET approach:

http://www.notlwonks.com/


I want to make the .NET version appear just like the HTML version ... with folder tabs and the coloring, etc.

But I don't know how.  I am unsure of where to apply the CSS for styling.

What has me confused is the <siteMapNode> tags.  Do they support CSS styling?

I'll do my best to stumble along until the smart people show up and give me a clue.  :)

Thanks,


Tom