Need help programming key 2006 Altima

Can anyone provide me instructions to program a second key for my 2006 Altima. I purchased the car about 2 weeks ago and the car lot gave me a key they purchased off e-bay for the second key. I had the key cut, then found out it would not start the car. I now know the key needs to be programmed but I can not find instructions to do so. Please help!:confused:

Try Remotes and Keys online. I have had really good luck with my extra vehicle fobs and key.
Good luck:smile: