I successfully installed PyQt in both mac and PC. To do so I had to install mingw (on PC), Xcode (on MAC) and Qt4.6 library. Now that I have PyQt working perfectly, I would like to uninstall mingw, Xcode and Qt Library from both mac and PC. 
I know I can remove Xcode and mingw, but what care should I take before removing Qt library. I know PyQt is still using it but it is not using whole 1.5Gig of files installed by Qt installer. So which files should I copy before removing Qt and where should I copy it to.
You can remove the demos and examples directories inside your qt installation directory... they take up over 1GB of space and are not required. I would leave the rest there, unless you are really worried about space.
If you do try to clean up the QT installation directory, start by renaming larger files/directories (e.g. add a .old suffix to the name), and see if the features you use in QT still function.  If it breaks, just rename the files/directories back (remove .old).
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