I want to connect to my server, run screen as root and then let another person log in a root also and let him run screen and attach to mine so he can "see" what im doing on the server. I haven't played with screen a lot but it seems a nice feature to teach him how to configure certain things. Sorry for the newbie question.
screen -x is what you want. This will however allow them to make changes right along with you. I'm assuming that if you're giving them root access that you're okay with this.
You can also name a screen session with -S so that you can give him an easy name to connect to. You'd do 'screen -S bofh_school' and he'd do 'screen -x bofh_school' to connect in multi-display view.