Choose 'save', the pop up will then ask where you want to download it to. Just choose the first option that comes up. That will be your desktop. Just pick 'save' again and it will start to download.
You're sims game might not have a downloads folder. No Problem! You can make you yourself! go to 'my documents' then 'EA games' and finally 'the sims 2'. Once there check if your game has a 'Downloads' folder. If it has then you can skip this part, if not then click on 'file' the 'new' and pick the folder option. name it Downloads, 'save' it and your done.
Now here it a tricky bit. You need to know what kind of file it is. you can tell by it's name...'''blah''.rar' for .rar files and ' '''blah''.zip' for .zip files.
To work with these files download winrar; http://www.rarlab.com/download.htm
Winrar might take a while to download. When your done installing it eta..
Right-click on the file you what to put in your game and choose 'extract files..' and then get to your sims downloads in the same way as before but by click the icons in the winrar pop up.
choose 'OK' and you will have your custom content in your game!
If you have any more problems just ask!:toothy7:
oh and this might help as well
http://www.insimenator.org/showthread.php?t=27964
P.S
turn off caps lock because it is seen as shouting.:shh: