How do I install Sims 3 Lots?- You will need Winrar or another program to extract the files. Please see post above to obtain a copy of Winrar!
-
Right Click on the file and extract it to a location of your choice. I usually put it on the Desktop...easy to find!

- Once you have extracted the file,
Double Click on the Sims 3 Custom Content file.- The Sims 3 Launcher will open and install the file.
- When it completes, click the "OK" button and the install window will close.
Uhmmm, where's the Lot once I open the game? 
- Ater clicking the
"Play" button and entering your Town, click the
"Options Menu" button and go to
"Edit Town"- 3 Options will appear...pick the 2nd Option
"Show Empty Houses" - All DL Lots will show. Click on the Lot and then place it
- Place the lot on an empty Lot of
Equal or Greater size- Click
"Accept"Voila! All done!
Enjoy!
How do I install Sims 3 package files?Files such as game mods, patterns etc need to be placed in the root directory of your game, located here:- XP Users = C:\Program Files\Electronic Arts\The Sims 3\- Vista Users = C:\Program Files(x86)\Electronic Arts\The Sims 3\ NOTE: Some of you may have Programs instead of Program Files. Do Not place files in My Documents\Electronic Arts\The Sims 3\Downloads...they won't work!Before the files can be viewed in game you need to do the following:- Download the
Resource.cfg file
found here.
- Extract the Resource.cfg file and place it
directly into The Sims 3 folder.
DO NOT put the Resource.cfg file in a folder inside The Sims 3 folder....it won't work!- In the same location, create a new folder and name it
"Mods"...without the quotes.
- Open the
Mods folder you just created and create a new folder and name it
"Packages" ... without the quotes.
The "
Packages" folder is where you will place your downloaded package files.
And that's it...you're ready to place Sims 3 package files! 
As always, when downloading custom content, be sure to
read the Creator's post and any special instructions for use or placement.
Some content does not belong in the Packages folder and will not work in game if placed there.
How do I install Sims 3 Custom Content files included in your Lots?Before you can install these files, you need to run them thru the compressorizer. Follow the below instructions.
Grab the compressorizer by Pescado
here.> Dounload the file
s3rc-win.zip from the first post by Pescado
> Extract the folder to your Desktop
> Open the folder and you will see the application
Once you have that...> Grab the Sims 3 Custom Content file and drag it over the application and release the mouse button. (drag and drop method)
>
Drag the files from the folder...NOT THE ENTIRE FOLDER. If you do that, it won't work!> You should see a window flash open and close fast as lightning.
>
Double Click the Sims 3 Custom Content file, the Launcher will open and install the files.