LTSP is the way to go, I think. They are a package vnc-ltsp-config that let VNC run multiple session on the same port for a fix resolution. My collegue find this guide (point 5):
http://wiki.centos.org/HowTos/VNC-Se...f60886edf611ec
This is what I need but when I connect with VNC, I have a blank background and after 2 min it closed by itself. Any tips?
Note: NX server is free for 2 client