CSS external files.

[eluser]InsiteFX[/eluser]
If you used my folder structure then use this.

Code:

RewriteEngine on  
    RewriteCond $1 !^(index\.php|assets|images|css|js|robots\.txt|favicon\.ico)  
    RewriteCond %{REQUEST_FILENAME} !-f  
    RewriteCond %{REQUEST_FILENAME} !-d  
    RewriteRule ^(.*)$ ./index.php/$1 [L,QSA]

If that does not work then you have something else wrong some place else!