I need two things: 1. 2Checkout passback script written in PHP - This script needs to check that the postback is genuinely coming from 2Checkout, gather all the variables from the cart and make them into local variables using the following variables as posted by 2Checkout: x_amount - the total amount to be billed, in decimal form, with no currency symbol. x_invoice_num - a unique order id from your system. x_First_Name - buyers first name x_Last_Name - buyers last name x_Phone - buyers phone number x_Email - buyers email address x_Address - buyers address x_City - buyers city x_State - buyers state x_Country - buyers country x_Ship_To_First_Name x_Ship_To_Last_Name x_Ship_To_Address x_Ship_To_City x_Ship_To_State x_Ship_To_Zip x_Ship_To_Country 2. Form Simulation Snippet written in PHP/fsockopen. - This script needs to have the form variables post and redirect the user to the page where the form variables are posted just like a regular post form would do.