Custom 404 error page

Dear Team,

Does Litecart have functionality to design a separate 404 error page?
And please guide us how to create 404 error page.

Thanks in advanced!

In ~/index.php

Find

    echo 'HTTP 404 - File Not Found';
    echo 'Could not find a matching reference for '. parse_url($_SERVER['REQUEST_URI'], PHP_URL_PATH) .'.';

Replace with

  (Your own code)

Thanks TiM,

For your valuable time and response!

In litecart controller trigger_error() returns defined error if an invalid key or id access with url, can we replace these types of errors by 404 error page.

Infact, Can we defined 404 error page for all types of errors in litecart at frontend (customer view).
Please, guide us how to set it.

Thanks in advanced!