I'm trying to accomplish a similar thing to what was asked in this question How to integrate WordPress template with CodeIgniter but my code igniter application is running in a directory above wordpress's and under a subdomain.
I think its worth saying also that putting the code igniter application under the same domain as wordpress does not stop the redirect to the installer.
I tried the solutions on that page as well as a few others from Google'n about. None of them seem to work.
As soon as I include ANY wordpress file the code igniter file redirects to "domain.com/wp-admin/install.php" I'm using the latest wordpress version 3.1.4 I believe it is. Has anyone done this or knows how to?