Complete Deal with NCR

A formality, this quest just requires you to talk to President Tandi that the squatters at Vault 15 will cooperate with NCR and accept their presence. End result is, Zeke gets a spiffy new house, the squatters get a life (food and water) and the NCR launches its expansion campaign in Northern California.

And no, you don't get a reward.

Warning! If you retrieve the computer parts from Vault 15 without completing the deal with NCR first you won't be able to do this quest since You can no longer talk to Tandi.