[mythtv-users] Connect VNC to Either of Two X Screens?

[Tortise]

As VNC is currently topical, can anyone tell me how to connect to the second desktop running as a separate X window, (two separate 
screens, Screen 0 and Screen 1) using VNC on mythbuntu 9.10?  One is mainly used for mythtv (distant TV) and the second for the 
desktop on a much closer monitor.  VNC just connects to the close desktop and there seems no option to get onto the second one?