@Krystal, I was in the same situation. Honestly, I just kept the pipes in the "group" they were sealed in plastic in and just began to fit things together until it looked right compared to the pictures. I actually did remove the surface skimmer because the intake doesn't fit in my tank with it on, so there is some "customization" possible. As for filter media:
Bottom Basket: 3 filter floss pads
Middle Basket: Ceramic rings and a couple bio balls
Top Basket: Bioballs, an Aquaclear HOB sponge (from old filter), and 2 stacked rena filter floss with a fine topping.