This mod enables you to live and build on the crater lot, turning it into a residential zone.
NOTE: The mod only converts the lot for saves that haven't loaded/visited the Lab prior. If you've already loaded the lot, you'll need to start a new game for the mod to take effect. The story may not be completely playable on saves with this mod.
Save the file directly to your Mods folder.
Make sure Mods are enabled in Gameplay Options -> "Other" tab.