If i have a website say www.mywebsite.com and a subdomain images.mywebsite.com, is there a way to call images from this subdomain instead of images/ folder?
I know images subdomain use images/ folder anyway but I want them to look like coming from another server and I don't know how to set this up in anywhere. I tried to change admin/includes/configure.php line that says

define('DIR_WS_CATALOG_IMAGES', HTTP_CATALOG_SERVER . DIR_WS_CATALOG . 'images/');

to


define('DIR_WS_CATALOG_IMAGES', 'http://images.mywebsite.com/');

but didn't work. I think this is specific to admin pages anyway.

I tried changing /includes/configure.php also.

Is there a way to use subdomain for images?

Thanks in advance.