Compile Qt Libraries and add it to Qt Creator

Hi, I download and install Qt 5.0.1 for Linux 64-bit (388 MB) then I download Qt libraries 4.8.4 for Linux/X11 (225 MB) and followed http://qt-project.org/doc/qt-4.8/install-x11.html Now how I tell Qt Creator to use Qt 4.8 instead of Qt 5.0.1 ? Thanks