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Download and unzip the file with your favorite ZIP extractor. Upload the page-sidebars.php file to /wp-content/plugins/. Activate the plugin and you are ready. For more detailed instruction follow these details:

1. Upload the file page-sidebars.php into your Wordpress directory under /wp-content/plugins/

2. Open your administration panel, go to Plugins, and activate it by clicking Activate next to the description of Page Sidebars.

3. You are now able to begin using the plugin. Go to [Pages] and select an existing page or write a new page. You will find a box named Page Sidebars. Enter the sidebar content in those two boxes (title & content).

4. To display the sidebar, add the widget Page Sidebars to one of your theme's sidebars (that displays on a page) [Appearance > Widgets].