Many Thanks,

Something very similar to your suggestion worked for me.
Its personalized to show site Owner, web design and powered by zen cart

includes\languages\english.php at line 16

define('FOOTER_TEXT_BODY', 'Copyright &copy; ' . date('Y') . ' <a href="' . zen_href_link(FILENAME_DEFAULT) . '" target="_blank">' . STORE_NAME . '</a>. Web Design <a href="http://www.compudoc.net.au" target="_blank">Compu Doc</a></a>. Powered by <a href="http://www.zen-cart.com" target="_blank">Zen Cart</a>');

Best regards
Renz