Save the tar.gz archive on your desktop. Right click on your desktop and choose "Change Desktop Background"... then click on the first tab "Theme" and just drag and drop the tar.gz archive into the Theme window. It will notify you that was installed!

That's all! Select the theme from there and you're all set up!

how do i use this. every time i download it, it just opens a folder that doesn't do anything for me. i'm failry new to ubuntu and i just need a little help. back in windows i just press download and i get what ever it is i'm trying to download. i dont understand why it doesn't do that for for on ubuntu