I have installed two 1.3.9a on ISP under folders; using the same database but with prefix, but none of them display correctly (no template). These are just default set-ups, nothing fancy, one with default products the other without.
This is a response from ISP:
The path of your zencart was set to point to the /docs not /docs/zen139.

So that maybe the issue of the image and template not loading in zencart, as they are pointing to an incorrect location.

To best of my knowledge, both pass are created correctly like this.

// these paths are relative to top of your webspace ... (ie: under the public_html or httpdocs folder)
define('DIR_WS_ADMIN', '/Zen139/admin/');
define('DIR_WS_CATALOG', '/Zen139/');
define('DIR_WS_HTTPS_ADMIN', '/Zen139/admin/');
define('DIR_WS_HTTPS_CATALOG', '/Zen139/');
define('DIR_FS_ADMIN', '/var/www/domains/stores.y2000.on.ca/docs/Zen139/admin/');
define('DIR_FS_CATALOG', '/var/www/domains/stores.y2000.on.ca/docs/Zen139/');

Test site: http://stores.y2000.on.ca/Zen139

Where should I look??