installing numpy and scipy for preinstalled Python 2.6 on Mac

[Naser Nikandish]

Hello,

I am new to the whole numpy and scipy world. I was going to install both but I read mixed things about installation problems compatibility etc. Here is the system I am using:

Mac OS Lion 10.7

I am using Python 2.6 that comes preinstalled on Mac. The reason I am not using Python 10.7 is that I need to use Gurobi which at the moments can be used by Python 2.6 on Mac. 

I was wondering if there is any clear procedure on installing NumPy and SciPy on this system. I really appreciate your help. Btw, I know numpy comes preinstalled on my mac, but it would be nice to install the latest version, if possible.