Copy entire archive contents to the the /wp-content/plugins directory.
Activate the plugin through the 'Plugins' menu in WordPress administration page.
Access the plugin administration panel through the 'Settings' menu of WordPress administration page.
Go to the Settings section and set the download directory name (or leave it as default) - the download directory will be created under /wp-content, so make sure it is writable.
If you want to grab, retrieve or download media such as images, video files, audio files and flash files from a public web site and use them locally in within your own WordPress blog, Web Media Grabber Plugin for WordPress is the perfect tool.
Extract and download anything from anywhere to your server file system! Use the downloaded media into your own WordPress pages or posts without external hotlinking.