In this guide I will be showing you how to get somebody's IP threw Skype.
First this you are going to want to do is download Skype. http://www.skype.com/intl/en-us/get-skype/
Once your slave is added, open up his profile and click "compact view". It should look like this.
Next run CMD as administrator and type in "netstat -nbt" press enter and you should get a ton of IPs. Look for "Skype.exe", one of those IPs is his.
Now this is the fun part, go to www.whatismyip.com got to locate IP addresses and search the IPs you get off the CMD Prompt. Look at your targets profile and try to find out his country and state etc. Compare to the IP you searched and if the info matches then you have his IP.