For accurate documentation on how this plugin works, please refer to the original plugin's site: WASABI WP Plugins Wiki | Related Entries.
The only difference in this modified version of the plugin is the addition of a separator for related entries displayed inline.
1. Download the plugin here
2. Extract the file related-posts.php
3. Upload the file to your plugins folder (wp-content/plugins)
4. Activate the plugin
I modified and updated this plugin because I noticed the authors were not active in developing this great plugin anymore. However, support will be limited as I don't exactly and accurately know the inner workings of this great plugin.
Please report any bugs or feature requests to will [at] gormful [dot] com.