How to install a different version of python-dev?
Solution 1:
Try installing python2.6 and python2.6-dev.
Solution 2:
You can use python virtualenv in order to separate the different versions and packages of python you need to run.
This question also deals with a similar problem.
There is also a bash script for installing and switching versions of python on the fly. If I remember the name of it I will edit this post. You can use that as well as Virtualenv to completely change python environments