Sorry if I've missed the answer to this question, but I've certainly searched the wiki and the forums:
I want to transfer sites from my old server to my new dreamhost account, but I don't want any downtime. I can transfer the files, and setup the databases easily but even so, I might make a catastrophic error along the way. So I need WWW access BEFORE I change the nameservers, so I can check those sites are operational first.
As I'm on paramount.dreamhost.com, can't I access my sites using some alternative, temporary address? Like http://paramount.dreamhost.com/myusername/mydomain.com -- if you see what I mean?
I've tried various possible address combinations but not hit upon a predictable one yet.