I created cj.theMezz.com with photos in cj.theMezz.com/albums
I can, of course, FTP to that dir ...
Now I want to add another FTP user and only give him access to that one directory.
Any idea how I can do that?
You can't do it with FTP. There's no easy way for two users to completely share a directory. You'd have to go with creating a Group, and that user will have to use SFTP so they can get to that directory. Or you can re-create that directory in their home space, and Re-map it, but you'd still have to create a Group so you can enter his directory:http://wiki.dreamhost.com/Unix_Groupshttp://wiki.dreamhost.com/KB_/_Account_Control_Panel_/_Domains_::_Remap_Sub-Dir
As I look at the albums directory (neat pictures, by the way), it looks like you're using ZenPhoto. I use Gallery (also a One-Click install) and it allows much more flexibility with permissions.
What is it you hope to accomplish?-Scott