Installing Python 2.5 with Python 2.6

[pranav]

Hi,
I used to develop applications on Google AppEngine SDK (which supports
Python 2.5) on my Fedora 10.
I upgraded to Fedora 12 recently and it has Python 2.6.
Unfortunately, some things are breaking up with the SDK. Here is the
trace http://dpaste.com/hold/126668/
I had been suggested by the  AppEngine guys to install Python 2.5.
So i wanted to know --  is it safe to install Python 2.5 alongwith
Python 2.6? How will i configure my OS to use Python 2.6 (which was
there already) and the SDK to use Python 2.5, which i will install
new?
Any other issues/suggestions/comments anyone?