No other nice option rather than template making!

Or Including a template file when that custom post type archive (according to its url) is accessed.

See further links for more info:

http://codex.wordpress.org/Function_Reference/load_template

https://wordpress.stackexchange.com/questions/21305/wordpress-load-a-template-based-on-the-uri

http://www.mihaivalentin.com/wordpress-tutorial-load-the-template-you-want-with-template_redirect/