Using .htaccess or Apache Handler

I want my shared web server to process ".ncs" files just like ".php" files. I know this can be easily done by adding an entry in Apache Handler. Ref: http://ift.tt/1M6eKFC

But as I have mentioned that I am using shared hosting, any changes made by me on Apache Handler will not work. Those lists are just for reference. I opened a ticket in my website provider's support panel and they told me that I should use .htaccess file for that. But I am unable to understand that how I may use .htaccess file to process .ncs files just like .php files.