DONATING
Please visit the donation center and go to the FAQ section.

MAKING OBJECTS
I've being asked so many times to write a how to make objects tutorial. I'm sorry, but english is not my mother tongue and it would take ages for me to do it. Also it's only me behind all the object design and site update of Sims Interior Designs...I can't clone myself LOL. Anyway, I use Adobe Photoshop and Paint Shop Pro to design my objects (most of them from scratch, others editing pixels from an image) and make them compatible with the sims using Transmogrifier. There are lots of tutorials out there (For example Miffy's Sims Architectural Supplies) and also great forums where you can find more information and contact real experts (The Sims Resource and N99 Message Center)

DOWNLOADING AND SAVING FILES

Downloading Files to your computer
When you choose to download a file, Windows will pop up a small window to ask you if you want to open the file or save the file to your computer, click save the file. After that, another small window pop up to ask you where to save the zip file.
All the files you download from Sims Interior Designs like most of the sims site are compressed by WinZip, so you can download faster. You must put the downloaded files to the right folder and UNZIP them fist. (Get WinZip here)

UNZIP the file
Go to the zip file you have just downloaded and double click on the file to open it. A WinZip window will open. (If you don't have a registered version, choose 'Accept' or 'I Agree'). When WinZip opens, click on the large ‘Extract’. This will open up an Explorer type browser. Using this, open up the folders until you come to C:\Program Files\Maxis\The Sims\Gamedata\xxxxxx (replace the xxxxxx by objects, Skins, Walls, Floors or Houses). Then, click on OK, and the files will be extracted to that folder.
Objects - unzip the .iff files to The Sims/Gamedata/Objects/
Walls - unzip .wll files into The Sims/Gamedata/Walls/
Floors - unzip .flr files into The Sims/Gamedata/Floors/
Roofs - unzip .bmp files into The Sims/Gamedata/Roofs/
Houses - unzip .iff file into The Sims/Userdata/House/
Skins - unzip .skn .cmx .bmp into The Sims/Gamedata/Skins/

Now run the game, the new things will appear in your game! If the file is a house, you will be overwriting an existing file, so you will be prompted and asked if you wish to overwrite. Just select yes. If you like the existing house of the same lot, please backup the file first.

If you are still having problems downloading, there is a fantastic winzip tutorial at Sims Plus

Build mode bug
The number of downloads you can have in your game depends on which expansions you've got. When we talk about downloads we mean: objects, skins, walls and floors. When you just got The Sims without any expansions, then there are the following limits: walls; 90, floors; 63, objects; unlimited, skins; unlimited If you've got The Sims with the first expansion Living Large, then there are the following limits: walls; 65.535, floors; 65.535, objects; unlimited, skins; unlimited If you've got any of the other expansions, then everything is unlimited! However there's something called the "Build Mode Bug" which gives the unlimited objects you download for some people a certain limit. This bug only applies for objects that show up in "Build Mode" and not in "Buy Mode". Like I said before this is just for some people as not everybody is experiencing this same problem or bug. When you download to many "Build Mode" objects, then the following things can happen to your game:
to many doors -> windows become doors
to many columns -> swimming pool ladder and diving board disappear
to many fences -> swimming pool ladder and diving board disappear
to many plants -> fireplaces become plants
to many windows -> staircases become windows
You can just delete some objects, but you can avoid it by getting Transmogrifier from http://www.lushcreations.com/transmogrifier.htm or if you have Hot date, using Sim Categorizer at http://paladinx.home.together.net/ (The oficial version called Sims object organizer is already available at www.thesims.com) and changing downloaded items from build mode to decorative or buy mode.

Hope this helps ;)