Thanks for the responses, http://code.enthought.com/enstaller/ I'll probably skip this. Although it looks like a useful tool, the computer / Python 2.5 installation i'm "managing" isn't on the internet, so any synchronisation or what not probably won't be possible there. ( i think that's what that was all about...) Happy to wait for a new NumPy package, plenty to keep me busy till then. Will watch this list for announcements. thanks to you all.