2003 Audi A6 "start 03 a4 without" Questions

...03 A6 How can I program a remote key for a 2003 Audi A6? I have an A4 and did this to re-program my key: 1. used the key to start the car...then turned it off 2. put the key in the driver door (door ...

...03 audi a4 quattro would like to send my ecu out to apr to get upgraded but i cannot locate it. Just bought the car and trying to set it up for racing not very in depth with german cars always worked ...