Which version are you building John?
Early Hawk T1 weapon training aircraft (wrap round grey and green camouflage) would have had the centre line gun pack and either bombs or rocket pods on the inner wing pylon (RAF Hawk T1's didn't have the outer wing pylon option, and weren't plumbed for drop tanks). Later some Hawks were modified to T1A standard, these carried an air superiority grey scheme and would carry Sidewinders on the inners and the gun pod. The basic jet trainer T1's would not carry any gun pods or pylons and were painted in the trainer scheme of red, white and light grey.
Now all Hawks are black (save the Red Arrows of course), so the fit will depend on the squadron and task, but can include air combat manoeuvring pods. By the way, all the Red Arrow aircraft used to be T1A's and the team had a war roll as point defence fighters, as did all the training unit T1A's, but I think this option had been dropped with the end of the Cold War.
Can't help with stages 13 & 14, maybe if you scan in a picture of what you are talking about?