Make url case insensitive

[eluser]aryan_[/eluser]
In my CI application I want all urls case insensitive. Here's my folder structure

application/
system/
assets/
uploads/
index.php
.htaccess

And, here's my .htaccess code:

RewriteEngine On
RewriteBase /rag
RewriteCond %{REQUEST_URI} ^system.*
RewriteRule ^(.*)$ /index.php/$1 [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php/$1 [L]

What to do to access all file within "uploads/" and "assets/" case-insensitive?

Thanks!