Which versions of Yafray & python for mac OS 10.4?

Dear Blender python YafRay people,
I am interested in installing YafRay on my Mac with OS version 10.4.9, which currently has python 2.3 that came on the Mac CD. From what I’ve read on forums, things crash if combining incompatible versions. So I’d much appreciate any wisdom on which versions to put together. If I need to upgrade to python to 2.4, do I first need to uninstall my python 2.3?
Thank You!