Make a folder to any location you can easily find - desktop for example
Download all the files in this thread and save them to the folder you just created
Right click on the first file and select "Extract here..."
When prompted, browse the next file by finding the folder they are in and selecting the next file asked for
Repeat until all files are extracted
Copy the sims3pack you got and move it to your documents/Electronic arts/Sims 3/Downloads
There, double click on the file and let launcher complete the install process
Play and enjoy!