I have checked instructions for moving WP to a different site, etc., but I haven't found a good solution to my situation:
I have a test blog at http://www.mydomain.com/blog/. It already has about a dozen posts, as well as theme, plugins and widgets that I would like to preserve. (I could manually import the posts, if necessary.)
I have a very well-trafficked static site at http://www.mydomain2.org, and I want to install WP in the root directory, so that I have the option of making it a multi-site blog. (I am assuming that the static part of the site will continue to function as is, except for the home page whose links I have duplicated in the front page of the text blog.)
Critical for me is that users of http://www.mydomain2.org have very little, if any interruption of service, including links on the home page.
I need direction regarding in what order to do things so that service at the static site, http://www.mydomain2.org will not be disrupted for more than minutes. (Anything more will result in howls of protest via email.)