Synchronizing time between two Windows 7 machines connected with a LAN cable

Question

I have a number laptops that run our application while connected to each other in pairs with an ethernet cable, but not connected to any external network or the internet. T

I need the connected pair to synchronize their system times, but since every computer needs to be able to synch with any other computer, I can't define one computer to be a time-server and the other to be a client.

Is there a way to do this with NTP? Or some other way?