I cannot agree with you. As the Walk on lot is a new feature in BV it could not be coded in preBV mod like this one. Sims could move from one lot to another just in two ways - taxi or own car.
It does not work with BV definetely - as my sim went to another vac lot by walk and got stuck - the game says there should be a driveway or so for this sim to be returned - so I guess this is caused by this mod.
This mod is great!!! I use it and it works pretty well in almost all cases. Just one time my sim did not return. but i forced him to with mailbox cheat.