First download Hamachi -> https://secure.logmein.com/products/hamachi/list.asp
Then open hamachi and push the Turn on/off button and you will get a nickname and an ip-adress. That's your ip you need.
Everywhere you find the ip adress in you config. files replace it with your ip.
To let your friends play on it they also need hamachi and log on your network. if you push the button down in the right on the hamachi window that looks like a triangle and you can choose to join or create a network. Select create a network and choose your net name and password. When you have done that you need to share this information to your friend or every1 in the world so they can log on your hamachi network.
And the repack i use is Ultimate 3.0.3 Server. Hope you did understand my english and good look with your server.
[I MUST NEVER ASK FOR REP]