And thanks for the 'screen' recommendation as well; looks interesting I'm going to study that.
After installing screen, you would type 'screen' which will open the new screen, then you would launch NRS in there, then hit Ctrl+a+d to detach and get out of your screen, then 'screen -r' to reattach to the NRS screen, and you can go back and forth like that. If you aren't sure if there is a screen running or not, you can use 'screen -ls' to find out. If there is one running, 'screen -ls' will also tell you whether you are detached from or attached to that screen.
It's dead simple and really useful.