Fedora :: Yum Will Not Run - Error "Could Not Find Platform Independent Libraries <prefix>"

It has been working fine until today where I've been trying to get a application installed that I used on fedora12 ok called SecureCRT. It looks like it was not running because of a python lib. My system has libpython2.7.so and it wants 2.4. The developers for SecureCRT said they have not written it for F15 yet but will for next release but try install with nodeps and symlink 2.4 to 2.7. This did not work. I copied libpython2.4.so.1.0 and a link to libpython2.4.so from my old F12 box onto the new one and the app started working a treat but no I've noticed that yum no longer works and can only think its this. I have removed the the 2.4 files but still nothing. the error I get from yum is:

yum Could not find platform independent libraries <prefix> Could not find platform dependent libraries <exec_prefix> Consider setting $PYTHONHOME to <prefix>[:<exec_prefix>] 'import site' failed; use -v for traceback There was a problem importing one of the Python modules required to run yum. The error leading to this problem was: No module named yum Please install a package which provides this module, or verify that the module is installed correctly.

It's possible that the above module doesn't match the current version of Python, which is: 2.4.6 (#1, Mar 23 2010, 12:56:48) [GCC 4.4.3 20100127 (Red Hat 4.4.3-4)] If you cannot solve this problem yourself, please go to the yum faq at: [URL] How do I fix this and is it possible to have both versions?