HP Z600 Xeon X5690 Installation Epic Fail

So I watched the GPC Gamers installing Xeon X5690 to Z400 star movie on youtube, he was poking my eye with the tips of minaret looking highpowered heatsink, I said why not Z600 is the brother of Z400 but it did not work that way.

I can not close the case cover fully but it holds, it holds with a 1/2 cm gap, I can live with that, bright side it is an extra air vent anyway BUT

The real problem is the plastic air duct with fan inside, cooling RAM Memory, that doesn't fit in.

So how do you install Xeon X5690s to Z600? Please help