Using Atlas 2 in Mathematica to calculate Riemann and Ricci tensors

[fu11meta1]

Is anyone familiar with Atlas 2 for mathematica to calculate the Riemann Tensor, Ricci Tensor, and scalar I have a metric that I need to calculate these things for. Can anyone help? I'm not too up on Mathematica either.

 

[Quantioner]

I am use Mathematica for a while. One can define his own functions to calculate all these quantities, Atlas 2 is not free.