I'm not an expert when it comes to TSimpleGraph but I did my best to use it in my database editor application for viewing relationships: Easy Access 2.0.
http://www.youtube.com/watch?v=WNbO2MJIRVU
(TSimpleGraph starts from 5:50)
I know. I probably could do it better
![Smile :)](./images/smilies/icon_smile.gif)
![Smile :)](./images/smilies/icon_smile.gif)