The default download option is to download the Sims3Pack file (several files if a Set) holding the custom content as a ZIP. This is done by clicking the button with the green arrow. Once you have downloaded the ZIP, you have two options: 1) Double-click the Sims3Pack file(s) in the ZIP to install it. Mar 13, · I’m new with the whole “Custom Content” thing. But I’m confused on how to download it. Can anyone help? Custom Content or CC for short can be pretty tricky with TS3. Same for mods. As far as I know there are Sims 3 Package Files and extracting zipped . Jul 08, · Best Answer: No sims content will work in the game when its in an archive (zipped or rarred). Plus adding custom content doesn't work the same way in Sims 3 as it did in Sims 2. Remove anything you downloaded into it, then use winrar, winzip or whatever program to Status: Open.