* Edit /etc/sysconfig/vncservers and change lines as follows (username is your linux user for the VNC session):
VNCSERVERS="0:username"
VNCSERVERARGS[0]="-geometry 1024x768 -nolisten tcp -localhost"
** Note you can have users 1-9 and each will connect to their VNC session at port 590n (some VNC clients 'know' the 590 part and only have you enter n)
** The -localhost options is needed if you are connecting through a ssh tunnel; if not do not use it