Htaccess override wordpress setting to use CI controllers ??

Hi,

Really could use some help. I am currently testing the following setup

WordPress in root
-Codeigniter in a subfolder

My questions:

1/ WP needs this htaccess

<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /projectz/domain.coml/
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /projectz/domain.com/index.php [L]
</IfModule>

Code (markup):

But now i need to override the WP rules for the following url's and their subfolder, variables, seo urls:

projectz/domain.com/jobs/................anything
projectz/domain.com/profile/.........anything

Code (markup):

I want those url's to be redirect to something like

projectz/domain.com/ci-folder/index.php 
or projectz/domain.com/ci-folder/ 
or projectz/domain.com/ci-folder/controller-name

Code (markup):

I like to be able to use nice SEO url's

Is this possible and how?

2/ Codeigniter uses his own htaccess to get rid of ci-folder/index.php and to prevent double content.
Should i make any changes to this htaccess as well??

<IfModule mod_rewrite.c>
    RewriteEngine On
    RewriteBase /projectz/domain.com/ci-folder   #don't know for surs

    ### Canonicalize codeigniter URLs
    ### http://farinspace.com/2009/06/codeigniter-htaccess-file/
    ### http://codeigniter.com/forums/viewthread/136195/

    # If your default controller is something other than
    # "welcome" you should probably change this
    #RewriteRule ^(main(/index)?|index(\.php)?)/?$ / [L,R=301]
    RewriteRule ^(main(/index)?|index(\.php)?)/$ / [L,R=301]
    RewriteRule ^(.*)/index/?$ $1 [L,R=301]

    # Removes trailing slashes (prevents SEO duplicate content issues)
    RewriteCond %{REQUEST_FILENAME} !-d
    RewriteRule ^(.+)/$ $1 [L,R=301]


    #Removes access to the system folder by users.
    #Additionally this will allow you to create a System.php controller,
    #previously this would not have been possible.
    #'system' can be replaced if you have renamed your system folder.
    RewriteCond %{REQUEST_URI} ^system.*
    RewriteRule ^(.*)$ /index.php?/$1 [L]

    #Checks to see if the user is attempting to access a valid file,
    #such as an image or css document, if this isn't true it sends the
    #request to index.php
    RewriteCond %{REQUEST_FILENAME} !-f
    RewriteCond %{REQUEST_FILENAME} !-d
    RewriteRule ^(.*)$ index.php?/$1 [L]
</IfModule>

<IfModule !mod_rewrite.c>
    # If we don't have mod_rewrite installed, all 404's
    # can be sent to index.php, and everything works as normal.
    # Submitted by: ElliotHaughin

    ErrorDocument 404 /index.php
</IfModule> 

Code (markup):

Further more Codeigniter uses a routes.php by which you can redirect incoming links to specific controllers. Would routes.php still be usable??


3/ can htaccess kill $_SESSIONS per subfolder??

kind regards,