v0.2 is fully eligible for PayPal's Express Checkout Promotion.
* Rewrote the core file, cleaned up redundant code and improved the debug email dumping function.

* Modified the core file to support the Express Checkout Button process flow.

* Added Express Checkout Button in checkout_shipping.php and made it eligible for Express Checkout Promotion.

* Replaced Pending Unconfirmed Shipping Address option in admin with the Require Confirmed Shipping Address option. Unconfirmed shipping address now can be rejected at PayPal page.

* Added Allow New Shipping Address at PayPal option in admin.

Full package. Please report bugs/issues/problems in the support thread below.

Support Thread :http://forums.oscommerce.com/index.php?showtopic=245571