Clarification, please. I have a domain hosted @ godaddy. I created a subdomain, later added a new url/domain2 pointed to that subdirectory. I want to use WP for both with same theme, but with different header, etc. I will have a blog in domain1 and, maybe, in domain2. I may add other subdirectory/domain sites later. Will the one installation of WP in the primary root allow that?
And, since the sites are existing, can I install WP without blowing out the existing while I quickly change/convert a page-at-a-time?