Hey..
Thanks
I tried this command.
It says, "Python2.5 is already the newest version" and then it still does not INSTALL it.
I also tried "apt-get -install python2.4" ,It throws error like

"Package python2.4 is not available,but is referred to by and other package.
This may mean that package is missing,has been obsoleted or is only available from another source"

Is there any manual way to install it ?.
I am really stuck and feels like installing PR 1.2 version was a mistake.
I am not able to install many applications due to this error.

Please help me out !!