Need to create an "almost" exact copy of my site

I know there are several threads about transferring Atahualpa, but I did not find one that will cover my needs exactly. Here's the situation:

I have created a site using Atahualpa theme at www.octaviosalles.com.br/blog . Now I need to copy this very same site, with all the settings, photos and pages (different blog posts, but I'll export those later from my wordpress.com account) to a different directory I have created called blog_english. This will be an english version of my site, with slightly different content but I will adjust that later. The index page will be just to direct to the portuguese or english versions.

The Atahualpa theme is already installed in this new directory, I just need to copy the content from the /blog directory. What's the easiest way to do it?

I appreciate if you could post a little step-by-step...

Thanks a lot for any help.