Instructions
Go to a "Sims 2" modification database website, such as ModtheSims.info.
Find and click on the "Downloads" tab, then find the "Unique Sims" tab or an equivalent section of the page.
Decide on the "Sims 2" unique person you would like to download. Click on the link leading to that page, and click on the "Download" link.
Save the downloaded files to your "EA/Sims 2/My Downloads" folder found in the Program Files section of your C-drive.
Extract your downloaded files by right-clicking on the downloaded folder, then clicking on "Extract Files." Complete the pop-up prompts to finish extracting your download.