I want to develop Qt apps with kdevelop on RedHat 9. But the kdevelop version in RedHat 9 is too old just version 2.1. So I wanna install a newer version of kdevelop on my machine, maybe kdevelop-3.2.
But I found that the newer version kdevelop requires the Qt newer than 3.2. But the RedHat9 only have Qt 3.1, so I should firstly install a newer Qt. I have downloaded the qt-X11-free-3.3.3.tar.gz. Should I uninstall the existing Qt on my machine before installing the new one? And how to uninstall the Qt in RedHat 9?

I am a freshman with Linux and Qt, but I am too eager to study in it. Any reply is great.
Thanks a lot!