For installing PyWPS:
    
1) unzip the archive with the program

    $ tar xzf pywps-3.0.0.tar.gz


2) Run the installation script
    
    $ cd pywps-0.1
    $ python setup.py install

3) Make symlink to wps.py file in your cgi-bin directory

    $ ln -s /usr/bin/wps.py /usr/lib/cgi-bin/wps.py

4) Update your configuration in etc/pywps.cfg

5) See doc/pywps-howto.[pdf|txt|html] for more details