Here's how you can install the plugin:
- Upload the plugins folder to the /wp-content/plugins/ directory.
- Activate the plugin through the 'Plugins' menu in WordPress
- Expand the Tools menu from WordPress dashboard sidebar and select "Image Sitemap."
- Click the "Generate Sitemap" button to create your XML Sitemap for mobile.
- Once you have created your Sitemap, you can submit it to Google using Webmaster Tools.