Make sure that when you import scipy that you get the correct version.
import scipy scipy.__file__ 'C:\\Programs\\Python25\\lib\\site-packages\\scipy\\__init__.pyc'
From your error messages, I would think python is loading the source distribution and not the compiled and installed version. It would be helpful to see your actual error messages from nose, with copy and paste, at least the first few and last parts of the nose tests. Your summary error message is not very helpful because it doesn't show your actual error path and trace backs.
When I installed the 0.7.0 b1 superpack on WindowsXP, it worked out of the box. The only thing to do, before installing a new version of numpy or scipy, is to uninstall or delete any old version in site-packages, since the directory names of scipy and numpy do not include version numbers. Installing on top of an old version, can leave some old files around which sometimes cause errors. Josef