Loeaderboards connected to Facebook

As I’m googling more about this I’m getting even more confused… How can I implement a leaderboard showing the user’s score compared to his facebook friends? I found a similar post here but I didn’t understand much how to solve this. Is there some easier way to implement this? I was hoping for a similar approach as the Heyzap leaderboards setup system/plugin.

Can someone please provide me with more information?

Thank you!

For those whose search result will end up in this question, I managed to implement Facebook friend’s leaderboards by using Prime31 Social Networking Plugin