Hypothetical approach: Can you not, say, send your sims on vacation, install them in a hotel, save, exit game, and then remove notownieregen, go back into the game to your "on vacation" sims, and let the game generate locals for a bit. When you have enough for your taste, you can reinstall notownieregen.
1) Would this work?
I'm not sure whether it would generate locals, but it
will generate a buttload of tourists.