I have a site xyz.com that is hosted on a VPS on my Dreamhost account. The domain name xyz.com is registered to my Dreamhost account too. I want to move the site and domain name to someone else’s Dreamhost account on their dedicated server. So far I have coped the site’s files to their server and so the site now appears from their server at xyz.dreamhosters.com.
What do I need to do to make that site on their server appear at xyz.com instead of mine? (I would like as little downtime as possible during the changeover).