Installing CI on IIS/Helm 4

Hi all,

I'm new to CodeIgnter and I'm trying to install CI on IIS/Helm  which my service provider uses. I don't want to convert the .htaccess file to a web.config file. Here is my .htaccess file: 

<IfModule mod_rewrite.c>

RewriteEngine On
RewriteBase /mysubfolder

RewriteCond %{REQUEST_URI} ^system.*
RewriteRule ^(.*)$ /mysubfolder/index.php/$1 [L]

RewriteCond %{REQUEST_URI} ^application.*
RewriteRule ^(.*)$ /mysubfolder/index.php/$1 [L]

RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ /mysubfolder/index.php/$1 [L]
</IfModule>

<IfModule !mod_rewrite.c>
ErrorDocument 404 /mysubfolder/index.php
</IfModule>

Please help .

Regards.