If you have Mac Ports, getting PyQt4, numpy and Distribute is as simple as typing:
sudo port install py32-pyqt4 py32-distribute py32-numpy
In order to complete the installation, open a terminal and type:
cd <BOING-DIRECTORY>
sudo python3.2 setup.py install
The boing executable may be not installed into a directory indexed by the PATH variable, so that it is always necessary to use the full path to launch it. To avoid this annoying behaviour, a simple solution is to set the installer target directory using the option --install-scripts. As an example:
sudo python3.2 setup.py install --install-scripts /usr/local/bin