I've put the pic in the gallery under 'intake', maybe it will help to answer the 3 thousand questions per day on where the idle control circuit is
Paulb81 - at the top left of the pic there is a silver hexagon shape with a purple connector on the end. Just underneath it there is another golden valve, just behind the black pipes. At the opposite end of the gold valve ( at the left of the picture ) is where the screw is, you can see the little tube sticking out ( the screw is inside ). You can see it if you look under the right of the throttle body ( looking at the engine front on ).