Removed my instructions for Windows NumPy install from install.rst, slightly modified @David Platten's version. Replaced my version on release-0.6.0.rst with @David Platten's version. Refs #133. Haven't tried it myself.
I used your suggestion of downloading a whl file and then installing it with pip. It worked fine. Perhaps both methods should stay up there? I think yours may be better, as if the user is using virtualise then they won't need admin rights to be able to install it.