When you get the box pop up with the diagrams on the left, on the right are the part numbers & descriptions etc., if you double click on those it puts it in your basket and it appears in the "parts" list under "my selection" on the rhs of the main screen. They start off blue, then the page reloads because I guess it's working out how rich you are and the part numbers appear in black. Once it's finished playing about you click the basket in the top right, this brings up the order screen. The first page of that is the details form (which you're not going to fill in), above that are a row of 4 buttons, the third one is another basket, click this and it's fill your trousers time again
