Add instructions for setting up windows environment

INSTALL.md

@@ -38,3 +38,38 @@ python setup.py install
 this will install all of the libraries and a few applications
 
 For running the file sharing application, see [RUNNING](RUNNING.md)
+
+#### On windows:
+
+Install [mingw32](http://www.mingw.org/) base and c++ compiler.
+
+Add C:\MinGW\bin to the windows PATH.
+
+Enable distutils to compile with mingw32 by creating a distutils.cfg file in *PYTHONPATH\Lib\distutils* containing
+```
+[build]
+compiler = mingw32
+```
+
+If using virtualenv, copy the *PYTHONPATH\Lib\distutils* directory to the virtualenv.
+
+It's recommended to use [Unofficial Windows Binaries for Python Extension Packages](http://www.lfd.uci.edu/~gohlke/pythonlibs/) for as many of the required packages as possible.
+Currently, available binaries include:
+- Cython
+- Twisted
+- Zope.interface
+- pywin32
+- Yapsy
+- cx_Freeze
+- requests
+- gmpy
+
+Install the each of the preceding binaries with `pip install *.whl`
+
+Install pywin32 system files by run `python.exe Scripts\pywin32_postinstall.py -install` from an elevated command prompt.
+
+Install the rest of the required modules with the standard `pip install module` command
+
+The one module which requires additional work is [miniupnpc](https://pypi.python.org/pypi/miniupnpc/1.9).
+Download the source and compile with MinGW by running `mingw32make.bat`
+Then install the module by running `python setupmingw32.py install`