Posts: 545
Thanks: 3327 in 19 Posts
11 Achievements
As far as I know, it isn't possible yet for players to do anything outside the actual lot, or to edit the neighborhood objects. Hopefully someone will hack the game to make this possible eventually. For now, try using the "drag wall" tool and move the walls in your home so they don't intersect the branches.
In TS2, the cheat was "move_objects on/off," and it allowed the player to build at the edges of the lot, move things like the mailbox and trashcan (which is a very dangerous thing to try, by the way), and to build or place objects on the sidewalk and street. It was not necessary to cheat to move anything else, because the game allowed players to decorate the neighborhood and move neighborhood deco--not possible in TS3.
In TS3 the cheat is "MoveObjects on/off." It is useful for a lot of other things, but it won't help you with your problem. Sorry.