There is another quick and easy option that they teach you NOT to do during A+ curriculum. That is to "hot adding" (switching) you monitor. Hook up the old computer to your monitor, configure it, get it folding away, hooked up to the LAN and with the 'puter still ON, UNPLUG the monitor!
In most cases it will still run, folding away. However, only do this if you don't give a rat's rear about your equipment. Also try to make sure that when hooking the monitor up, the 'puter is turned off.
That sounds like a very good way to blow up something. Worked on computers when i was in Air Force (B-52 bombing/navigation system) but that was a long time ago and computers have changed faster than i can keep up. I will be looking at hopefully three computers up and running on Monday only two monitors so will have to figure something out maybe try to find a small monitor for now.
Again thanks