a better way to deploy z3ext

Wondering if the stable z3ext install instructions shouldn't use virtualenv as well... With ubuntu karmic when running bin/instance i'm having conflict problems with the import of python-speechd (!!!!) pkg. Also in karmic I had problems with twisted web2 since it's not a default pkg anymore.

My hack to get things working was:
cd z3ext
virtualenv -p python2.5 --no-site-packages .
bin/python2.5 bootstrap.py

wget http://tmrc.mit.edu/mirror/twisted/Core/8.2/TwistedCore-8.2.0.tar.bz2
extract and run bin/python2.5 setup.py install

wget http://tmrc.mit.edu/mirror/twisted/Web2/8.1/TwistedWeb2-8.1.0.tar.bz2
extraict and run bin/python2.5 setup.py install

./bin/easy_install-2.5 zope.interface
remove "/usr/lib/python2.5/site-packages" from /bin/instance
remove "/usr/lib/python2.5/site-packages" from debugzope, runzope

bin/buildout -v

I assume there is a cleaner way to do things so I would appreciate any advice on buildout and virtualenv...

thanks

i'm working on virtualbox installation documentation 

i added docs section about virtualenv http://docs.z3ext.net/install/settingup/