I originally installed WP in a directory:
foo.com/bar
All works fine.
I configured a redirect from bar.com to foo.com/bar
and changed the settings in WP for the blog address to be bar.com, but that doesn't work as it goes to bar.com/bar, which doesn't exist.
The reason I'm trying for such a complex solution is I have no access to DNS setting on foo.com, and bar.com is parked - i.e. no hosting there. I see no point in buying more hosting - since I have some on foo.com
Can I make that work somehow?