Hi Mario,
To go on a slightly different tangent, you may want to consider using a virtual X11 software e.g. Xvnc, RealVNC, TightVNC, etc., instead of Exceed. Not advocating for any one particular developer's offering -- they all seem to work consistently. Most notably, they are much faster and more responsive than X11 when displayed physically. (Virtual = X11 windows display within VNC client. Physical = X11 windows display as individual windows much like any other application window.)
Further, if your network connection gets disconnected, once you reconnect all your X11 apps/windows will be where you left them. You won't have to worry about what state you left any possible changes made in smconsole.
VNC uses its own port to communicate between the VNC client and VNC server. The default port is 5901 but easily changed. The port can be forwarded over SSH.
Multiple VNC sessions can run simultaneously.
The server portion of the software can usually be installed and instantiated without elevated privileges.
Thank.
-Roman