How can i add this social plugin to my own installation?

You'll have to be more specific. What is 'your own installation'? Are you not using the Account component?

I have figured out how to install plugin to my server installation. Create account here -> add plugin to account -> connect account to my installation and sync plugins.

Thanky you for your quick reply!

Oh, I understand your original question now. Sorry about that :) Hope my plugin works out for you.