@mw1525 - I think she means that her additions to the mod are arranged in such a way so as to not conflict with the original purpose of the overhaul mod that she took over from its prior developers.
An "override mod" is either a synonym for a tuning mod or one is a subset of the other, was never entirely clear on that myself. It may depend on whom is being asked. Perhaps MTS should have called the not really directly related Mods\Overrides folder in the usual Framework something else like Mods\Priority so as to avoid such confusion, though it's a bit late in the game to go back and suggest that now. :)
But you know what, you can put all of your mods in Mods\Overrides if you want. I think they should still probably work as long as one of them doesn't require priority over the other like the two I have or the exercise bike in my example above. Doing so kind of dilutes the purpose of even having an Overrides folder though. Sill though, I wouldn't say that was the recommended placement for the vast majority of mods. The correct answer is the one that works best for the player.