I am helping someone with their web store. They are using Zen Cart. The seller wants to change the way the shopping cart "behaves". Since he sells mainly unique one-of -a-kind items he wants to decrement the item's qty as soon as the item is added to the cart. This prevents someone else from adding the same item to their cart, before the first customer has checked-out.

Also, he would like the shopping cart to only be a session cart. If the session times out or the customer logs out, then any items added to the cart will be "returned to stock".

I have been looking at modifying some of the .php files (esp . shopping_cart.php and main_cart_actiopns.php). So I was wondering, has anyone inmplemented either of these features ?

thanks, Ed