Python 2.6 on Mac 10.7 doesn't work

[Naser Nikandish]

Hi,

I am trying to install Python 2.6 on Mac OS Lion. Here is what I did:

1- Download Mac Installer disk image (2.6) (sig)   from     http://www.python.org/getit/releases/2.6/

2- Install it

3- Run Python Luncher, go to Python Luncher preferences, and change the interpreter to Library/Frameworks/Python.framework/Versions/2.6/bin/pythonw

Now that I want to open IDLE and open my old projects, it doesn't run! 
Is there anything that I am missing?

oh btw, I used to use Python 2.6.7 that comes preinstalled on Mac OS.

I really appreciate your help.