automate class completed confirmation delivery direct google-checkout helps info labels link method paypal populating printing sale shipping tracking usps years

Anyone have a good method to automate printing of USPS labels (1st class with delivery confirmation) after a sale is completed through e-junkie and then populating the tracking info back to google checkout and paypal?

Use PayPal shipping method. I am using this for two years. This is the direct link

https://www.paypal.com/us/cgi-bin/webscr?cmd=_ship-now

Hope this helps