Oscommerce/Paypal bug fix

I have a Paypal IPN contribution installed, but with the following bugs that need fixing. 1) When an order is paid for via Paypal, no order is logged within the Admin section, therefore no confirmation email is sent out, no invoice created etc. I would need the order to be logged at the point at which the payment has been made. I do not want the customer to have to click on "return to merchant" or "continue" in order for it to be logged, as most won't do this! 2) I’ve also seen the possibility of pre-populating the paypal sign up in order that the customer doesn’t have to give the same information twice (first at my store and then again on the Paypal page). I seems to be pretty easy, everything is described here and the code is already provided by Paypal : [login to view URL] I just don’t know exactly where to insert the code. 3) I would also like the Paypal receipt and invoice to show the model and size of goods ordered, not just a generic name. That's it!