First thank you cablesimple for leading me in the right direction.

I currently have
/httpdocs/includes/modules/pages/customers_authorization/header_php.php

Set up to send my regular customers back to the public site by using:
HTML Code:
if ($_SESSION['customers_authorization'] != '0') {
  zen_redirect('http://store1.salvationarmy.ca' ."?zenid=". zen_session_id());

}
I've also used similar variations to update various files. The two sites are really begenning to look like one.

However, I want to follow this idea through more. In the file mentioned above I would like it to send a customer with products in their shopping cart to:
HTML Code:
http://store1.salvationarmy.ca/index.php?main_page=shopping_cart
I'm not sure what sql inquiry I would have to add for this. I've been trying to take fields from the login header, but as of yet to no avail.

Any ideas?