By default, location has zero influence on walkbys, and walkbys are not predisposed towards being only in places they live, within the following rules: YAs are never walkbys outside of Uni, NPCs are never walkbys on residential lots, and downtownies never visit any non-downtown lot. Everyone else arbitrarily traipses all over the place without regard for locality or interest.
Ahh ok, I noticed that, thats whats why I was worried. In that case, I can go ahead and move sims around then. Make my hoods look more higher scale with more space between lots filled with trees and beautification then. Also help on the poor video card too. *Happy Camper*