i'm confused when I first downloaded this I thought it was for non-decrapified sims store stuff but now it says for "Crapified" sims store stuff

so which is it? 

More lots have been placed (special credits to Behind the Junkyard by Shady@MTS and Little Robot Shack by Shivar@Fuzzy Logic Dishwasher). One lot contains build mode CC (download: 3 New Porch Fences by Flabaliki@MTS for the pool to show up correctly.

You know, if you are exporting a world for a second time, don't just rename it in the save as, go into add/edit description from your layers pallet and change the name there. This is what's causing this for everyone, although you rename the world when you save it, it still has the same internal name and the launcher usually says it's already installed. I have 5 versions of one world installed right now but they all have different internal names, even if it's blah1 and blah2 they will all install even though they are the same. I did it to compare different layouts, etc

The difference: I set my config to testingcheatsenabled false.

Mine was set to that until just today, and it still got all stuttery. So I think that may just be coincidence.

As for the welcome wagon, do they have to come inside the building to ask to be buzzed in? I only got the wagon on the non-shell apartment in bridgeport, which has the mailbox outside, which the welcome wagon would stand by. Maybe in the other ones they come inside to the mailbox, and then trigger the "Buzz in" thing.

because if it doesn't work then I would need a full re-install fking duh! and since I am building a world I wasn't going to risk it. After countless of forum posts I finally got a response that it doesn't work, which is what I figured in the First place until some idiot had to go and post here that it does work when it doesn't.  So If you truly did not know what the problem is or was, then you sir are an idiot. It's a simple question. I'd be amazed the day The sims Team releases a CAW update with an Expansion Pack.

Before you start, you'll want to enter the cheats for "testingcheatsenabled true", "buydebug", and "rbbb off". This will allow you to purchase the markers that allow apartment functionality, and allow you to edit the portions of a lot that are considered public space within an apartment.

When you create an apartment building, there are three important markers within buydebug that you'll want to use...

1. Public Room Marker - This marker should be placed in any room that you want any Sim who is visiting the lot to be able to walk around in, consider it as public space within a building such as the lobby. Unless cheats are entered, when you enter build / buy mode on a lot, any room that has a Public Room Marker can't be edited. The Public Room Marker is also the object that flags a lot as an apartment lot. Once one of these has been placed, any outdoor areas on the lot will automatically be flagged as public space. One special note: If you place a parking space in an area that is flagged as public space, your Sim can still purchase a vehicle and park it in that spot.

2. Hidden Room Marker - This marker is similar to the tomb room marker from World Adventures as some people have noted. It will turn a room completely black and hide the contents from the player. There is no way to unhide a room once this marker is placed inside it. You should place this marker inside the rooms that other Sims who will populate your building live inside, thus hiding it from view as your Sim can't visit their living area. If you hold CTRL + SHIFT and click on the hidden room marker, you can also set ambient sound for the building. You should only set this on one hidden room marker per lot, and it should be the marker closest to the player's apartment. Finally, any door that is connected to a room with a hidden room marker inside it should be flagged as an NPC door if you want another Sim to live inside it as if it was their apartment. Hold CTRL + SHIFT and click on the door, and select the "Make NPC Door" option.

3. Level Skip Marker - This marker isn't essential, but it can come in handy. For example, if you build a four story building, and your Sim's living area is on the top floor, you may want to add a level skip marker on the second and third floor if your Sim has no reason to ever visit those floors. When this marker is placed on a floor, moving the camera up or down a floor will automatically skip past a floor that this marker is placed on.

For your Sim's private living space, aka any room that makes up their actual apartment, don't place any markers in those rooms at all. Any room without a marker will be considered as a room that the Sim living on that lot owns, and they will be able to freely edit it in build / buy mode without cheats. Additionally, areas without a marker are the only areas that count towards the lot value or environment score.

On a final note, every building that you want to have function as an apartment should have the Callbox object placed in an area that is considered public space. This will allow other Sims to visit and to call the NPC Sims that live in your new building!