MayaVi install

[Gib]

I am trying to follow the instructions for installing MayaVi  given on
the Enthought site:
http://code.enthought.com/projects/mayavi/docs/development/html/mayavi/installation.html
I'm following the step-by-step instructions to install with eggs under
Windows.  When I get to this point:
easy_install Sphinx EnvisageCore EnvisagePlugins configobj
Sphinx 0.6.3 is installed OK, but when envisagecore 3.1.1 is being
installed, after doing a few steps it fails with the message:
error: Setup script exited with error: Unable to find vcvarsall.bat

A search showed that vcvarsall.bat is where you might expect to find
it, in
C:\Program Files\Microsoft Visual Studio 8\VC
I'm not sure what to do now.