drop index.php when CI is a sub-dir?

[eluser]LiorBroshi[/eluser]
Hi There,

I can't figure out how to drop index.php from my website's address.
the main public_html is used for the actual site assets and everything else is under /codeigniter dir.

the structure of the files is:

/public_html/
-> /images/
-> /css/->
-> /js/
-> /codeigniter/
---> /application
---> /system
-> index.php

now index.php is the CI's started, and inside it the app is defined to:
$application_folder = "codeigniter/application";

How can i set CI to avoid index.php (config.php + .htaccess) ?

Lior.