Yesterday I placed a new theme folder "connections" in the wrong place, didn't know that I could use the ftp client to delete. Now just did it. Use a new theme called "thirteen", I like the green color.
I still want to remove the WP installation at "/blog" and do a clean install again into a subdomain such as emba.mydomain.com. I still think that is a proper way.
Have written this morning to DreamHost tech support again about how to delete Gallery installation which is stuck now in the root directory