Fake Dual Monitors

[Toninho]

VNC just does the Virtual Network part. If you can "fake" the graphics 
server to support a few monitors then VNC can serve all of them.

What you need are fake (virtual) graphics cards. Microsoft did this in the 
Remote Desktop Virtual Curtain Driver just to enable RDP into Live Mesh 
software!

Note that today many cards have embedded support for at least 2 monitors. 
Some even support 3 or 4 of them. In this case you just need to enable the 
monitors in Windows or Linux and the VNC server and clients will be happy 
with them

Antonio