I have installed ZenCart several times. Not bad, I would say. But osCommerce is better :-) The only reason I had to offer ZenCart to the customer - his hosting provider had register_globals turned off in php.ini settings and osCommerce requires this option be set to 1 (on). So, ZenCart is good only for this occasion. Just in case some hoster looks at my post - I want to say: turning register_globals will not increase the security level much...

Regards.