I have a client that would like to have a site duplicated on 2 different domains. He wants to have a different header image and company name (possibly different footer text as well), but he wants the rest of the site to be an exact duplicate. Most importantly, he wants to be able to edit the duplicated site content in one place and have it updated on both sites. Is there a way to do this with WordPress? I know about multisite, but I can't figure out how to duplicate content (posts, pages, custom-post-types,comments, etc) while still having only one place to edit. I understand that this is committing SEO suicide, but that's how he wants it. Any ideas?