WordPress.org

1. Just install the plugin, a custom googlemap post type will be added on the side
2. Add some googlemaps on the new googlemap tab
3. Add the googlemap codes in a post as you like. Useage below.
4. In the settings choose a page for the overview googlemap page
5. check your site and watch the glory

Usage in a post. Use the custom post id of a googlemap post and add this in codes like these: [dimme-googlemaps=123] and it will parse.