Quick qustion about the headlights

[slik240sx]

Hey, im just doing this for a friend of mine who drives an audi and hes pretty lazy to write all this stuff out himself. The question is how do you take out the whole headlight assembly and the corner piece with out wrecking anything. Also the car is a 98' A4 just to let you know. If anyone could help that would be much appreciated.

thanks.