How to install a Drupal theme:
1) Unzip the theme zip/rar file.
2) Upload the theme folder using a FTP software to your "your drupal folder"/themes/
on your web server. Do not change name on the folder.
3) Login to your Drupal admin panel, click "Administer" - "Site building" - "Themes"
and click "Enabled" on your new theme.