Changing how cities work plots - multiple workers per plot

[Hammurabi II]

Hi, I'm wondering what would be the best way to attempt to change how a city works a plot. What I mean by this is, changing it so that a city can assign more than one worker to each plot. My goal is to create plot improvements that allow multiple workers to work each plot, and was wondering if anyone had any ideas to help?

I have been searching through the SDK but it has been awhile since I've done anything with C++ (I barely did much even then. I'm in university for engineering and so have taken what little programming they assign engineering students - VBasic, Matlab, MathCad).

I've started by looking at CvCity.cpp, and am trying to work things out, but honestly I have never worked with the SDK before so came here looking for suggestions! If anyone has any ideas or suggestions I would really appreciate it!! Thanks!