I'm also sure it would be a pretty minor bit of maintenance -unless some bright enterprising young lad, Hrrrrrm, used the absolute minimum variable type or hacked a "structure" into a byte wide variable as two nibbles to save space or some epic bit of genius like that... been there, regretted that later.
The thing that's annoying about it is that the actual code controlled by the values in the file obviously has the ability to make use of the manual values set in the configuration file that was hacked. It's probably just a bit of GUI that would require tweaking unless you were attempting to build a "Kreskin" function to please Nogle...