So that you don't think that the 1-year delay in posting part 6 was due to me manually drawing the population heatmaps in Paint, I finally split the code I used to produce all the plots into a set of modules and uploaded them to GitHub. You'll need the usual scientific Python stack (NumPy, SciPy, matplotlib as well as PIL) and a C++ compiler. Since I wasn't sure if it's a good idea to post the game data dump that I produced, you'll have to make it yourself: you'll need the original Morrowind.esm data file and Enchanted Editor (instructions on how to produce the dump are in the README).
With all that in mind, I've run the code end-to-end and it spit out a similar set of images to what I have on the blog, which makes me incredibly happy.
Now it's time to get back to Cookie Clicker!