You should be well acquainted with Joomla and Virtuemart since I need this solution fast.
I anticipate that you already know that Virtuemart sends an order confirmation email to the buyer already before the payment procedure is initiated. I want to
1) stop this order confirmation email from being sent (minor hack)
2) make Virtuemart send the order confirmation email automaticaly when the payment are comp;lete and confirmed on paypal.