Please see the website [url removed, login to view]
It is a freeware shopping cart which runs in php. When an order is taken it simply emails the admin and places the order as pending.
I would like a simple page creating which takes payment via paypal and then either cancels the order if the customer doesnt pay or marks the order as complete if they have paid. need to be able to change the paypal address through the admin screen. paypal needs to be sent the order name, order number and the customers email address.