The Python Web Modules do not need formally installing although it is eaiest if you do install them. All the examples, tests and scripts will run straight from the distribution once it is unzipped (see note above about optional components).
If you wish to use the web modulest the only requirement is that Python can find the web directory containg the web modules. This can be achieved in a number of ways:
python setup.py install
import sys sys.path.insert(0,'C:/path/to/distribution/directory')
Note: You should not include the web directory in the path otherwise Python will look for a directory called web inside the web directory and will not find it!
Once the web modules are imported, internal paths are setup so that you can import Cheetah or pdbc for example, but you must import the web module first.