Installing numpy from executable - pointing to SPSS library

[Andy W]

I'm trying to install the numpy Python library from the executable files (http://docs.scipy.org/doc/numpy/user/install.html). When going through the user prompts, the file chooses to install to a separate location of python on my machine, and does not allow me to choose the SPSS library location. (See image at end.)

This is more of a python problem but I figured I would give the folks here a shot if they knew the answer right away. Is there maybe a way to execute the .exe file from the command prompt with the correct library location?

I have easy install currently set up to install at the SPSS location, but if that fails I have a difficult time installing libraries - especially if they have code that requires compiling different languages (e.g. C++). So I have successfully used easy install for a few libraries - but no go with numpy. I've tried setting every imaginable set of environment variables to the SPSS python library (PYTHONHOME, PYTHON_HOME, PYTHONPATH, etc.) but the SPSS library location still never shows up as an option in the executable.

(What happened here is that I installed ESRI's ArcGIS - which uses python in a pretty similar way - after SPSS, so that newer python path wins apparently). I'm hoping I don't have to muck around in the registry (https://docs.python.org/2/using/windows.html) - I don't think the IT guy will take too kindly to that (and I couldn't even find the keys mentioned in the docs anyway!)