Upload the whole plugin folder to your /wp-content/plugins/ folder.
Go to the Plugins page and activate the plugin.
Go to your widgets area, and add a MaxRef Widgets (as many as you want)
Click on Edit to configure your new widget to display Posts by Category, Pages, Links by Category, or Comments, and then your Sort and other options. Use the new second tab section to show a widget only in certain blog post categories.
Requires: 3.1 or higher Compatible up to: 3.2.1 Last Updated: 2011-11-23 Downloads: 6,050