To run the install script point your browser to the base URL of your website.

The base URL is defined in your Web server configuration file and is specific to the document root where you placed your Drupal files. If you have installed Drupal on a Web server this will likely be a domain name such as http://example.com. If you have installed Drupal on your desktop machine this URL might be http://localhost.

1. Start by downloading the installation profile and unpacking it.
2. Copy the entire directory that you just unpacked into the /profile directory of your core installation. For example, if you have core installed at /home/www/htdocs and you downloaded and unpacked an installation profile called "fooprofile", you would want to copy the entire "fooprofile" directory into /home/www/htdocs/profiles/fooprofile.
3. Read the documentation on the installation pack you downloaded. This can either be found on the profile's project page (example: Innovation News Installation Profile) or in the README.TXT that came with the download (example: Drupal Hebrew Installation Profile). It should contain installation instructions such as listing the required extra modules and/or themes that you will have to download.
4. Download these modules and themes and put them in the right directory. This is usually sites/all/modules and sites/all/themes.
5. Go to your site's install.php and select which installation profile to install