The black edition or *BE* has an unlocked CPU multiplier.
You are correct in that a PhII is a PhII is a PhII. In order to OC with the 945 it will be necessary to increase the clock above stock 200MHz.
By dropping the memory ratio a notch and clocking to the 240MHz range, with good cooling you will easily hit 3.6GHz with the IMC/NB raised from 2000MHz stock to 2400MHz (a good thing). Your RAMs will also be returned to stock spec.