Checkout the current code from the SVN repository:

$ svn co http://www.bx.psu.edu/svn/bx-python/trunk/ bx-python-trunk

This will checkout all the source code to the directory bx-python-trunk. Change to that directory:

$ cd bx-python-trunk

Then run the setup.py script. For example, to install under your home directory:

$ export PYTHONPATH=$HOME/lib/python
$ python2.4 setup.py install --home=$HOME

This will install package the code up in a python egg that is installed in $HOME/lib/python, and install wrapper scripts for all the tools into $HOME/bin.