Aha. I wondered where you'd snuck off to. Been hiding in the Alhambra section on here. When'd the Bora go?
Anyway, do you have the plastic tag which was supplied with the car when new? It'll have the pin you need to code new keys to the immobiliser. Without that you need someone with Vag Tacho or Vag Commander to read the system for the pin. After that it's a simple enough procedure with a new transponder, to code it to the immobiliser. Which one you need will depend on the age of your car and the immobiliser system. The remote locking procedure is easily done with no tools, just a matter of a series of presses with the new key and the old one in the ignition or something. There's a
guide online if necessary. Key blade buying and cutting can be done online (
here) with a good digital picture of your existing key. He also supplies virgin transponders in the flip part if necessary, although you need to know which type you need.
First up, the pin. Then a remote with the correct frequency, and a key blade/transponder. Then VCDS (Vag Com) to code it to the car.
All in all, pretty similar to the Bora if you ever had that done.