On the return page from paypal we set it up to run the "process payment" and "insert to database" with a before page load or always trigger. Instead you can add a "confirm and pay" button to that page and update those two server behaviors to use the button press trigger. Then you can use that page to confirm payment before it is processed. You would probably then want to create a new page to redirect to in the "process payment" to show the success message once payment has been made.
Did this help? Tips are appreciated...
