What OS are they running? Win32? Linux? If win32, then that article will be the best route to follow, however if they are running linux, then it'll be a bit different.
Let me know what OS.
Oh, and if your running them on servers that don't belong to you, get permission first, people have gotten into trouble running clients like this on other peoples machine. If you don't get permission, it's your hide, but I do recommend doing that.