Sorry, I assumed "installs" was the default name of the folder created in the one-click process. Perhaps it was just one I made up on the spot when I did the one-click install of WP 2.2.3 back in September. It exists one level below the root. My blog is titled Man and Ultraman, so I created a directory in the root named manandultraman.com (it's in there with Maildir, Storage, logs, My Received Files, etc.) Inside the manandultraman.com directory is where I created "installs," which is where I originally installed WP.
When I was unable to upgrade via one-click earlier this week (evidently 2.2.3 was too old a version to upgrade?), I decided to do a clean install. But Dreamhost wouldn't let me install to the same directory (kept telling me it wasn't empty). So I decided to create a new installs folder - "installsnew" - and deleted the original installs directory using Webftp. Then I successfully installed WP 2.5 into "installsnew", and got the confirmation email from Dreamhost, and spent some time playing with new themes etc. I even installed ZenPhoto into the new directory, and also got a confirmation email from them.
Then, yesterday morning, it all went horribly wrong. My former domain (manandultraman.com) is dead/inaccessible. So is the link Dreamhost sent me to administrate my new blog (at manandultraman.com/installsnew). My Gallery2 site is gone and all photos and links to it elsewhere are dead - even though it was installed into a separate directory in manandultraman.com. My ZenPhoto account doesn't exist where they say it should.
So, as I noted in my original post here, I used the .snapshot directory in Webftp to restore my old 'installs' directory to the account root. But that seems not to have helped at all. Any insight would be most appreciated. Thanks!