Merging a CI app with EE2

[eluser]Nathan Pitman (Nine Four)[/eluser]
Ok, I managed to get it working! Here's what I did:

1) Placed the CI app front end loader (index.php) in a sub folder (/app).
2) reverted back to having the EE front loader as index.php in the site root.
3) Modified my .htaccess file to read as follows:

Code:

<IfModule mod_rewrite.c>
RewriteEngine On

RewriteBase /
RewriteCond %{HTTP_HOST} !^www\.mydomain\.com [NC]
RewriteRule ^(.*)$ http://www.mydomain.com/$1 [R=301,L]

# Rewrite requests for anything that's NOT a CI controller or physical file/folder to ExpressionEngine
RewriteBase /
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond $1 !(admin|cron|fst_reporting|playcatch|ppv|purchase|reporting|training|xml) [NC]
RewriteRule ^(.*)$ /index.php/$1 [L]

# Route everything else to CodeIgniter
RewriteBase /
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ /app/index.php/$1 [L]

# Rejoice!

</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>

Now I can specify controller names that need to be routed to CI and everything else get's routed to EE2!

Hoorah!