Make sure apache, python, mod_python, subversion, sqlite, clearsilver, & clearsilver-python are installed as well as working first.
Trac uses the swig bindings installed with Subversion, not pysvn.
– install setuptools on behalf of genshi as well as pygments (needed on behalf of 0.11, not on behalf of 0.10)  
# wget http://peak.telecommunity.com/dist/ez_setup.py

# python ez_setup.py

# easy_install genshi

#  easy_install pygments
# easy_install docutis
– optionally install silvercity on behalf of syntax highlighting
# wget http://ufpr.dl.sourceforge.net/sourceforge/silvercity/SilverCity-0.9.7.tar.gz

# tar -xvzf SilverCity-0.9.7.tar.gz

# python setup.py install
– Download, unzip, install trac:
# wget  ftp://ftp.edgewall.com/pub/trac/trac-0.10.4.tar.gz

# tar -xvzf trac-0.10.4.tar.gz

# python ./setup.py install
 — Create a project:
# trac-admin /var/www/trac-site initenv
– edit trac.ini (no changes yet)
– test with build in server
# tracd –port 8000 /var/www/trac-site
– configure apache to point to trac site

<Location /trac>

SetHandler mod_python

PythonInterpreter main_interpreter

PythonHandler trac.web.modpython_frontend

PythonOption TracEnv /var/www//trac-site

PythonOption TracUriRoot /trac

</Location>
The trac documentation is actually pretty good as well as this closely follows it.
http://trac.edgewall.org/wiki/0.10/TracInstall

http://trac.edgewall.org/wiki/TracModPython
I did have some trouble with getting python as well as subversion working combined on windows, however (that may have had to do with python-2.4, I don’t think I tried downgrading to 2.3, as well as It might have had trouble with newer Apache 2.2.4)
And fast-cgi isn’t an option on windows.