Yes, X is installed and configured on both machines.
xf86config is doing fine
ls -l $(which xf86config)
-rwxr-xr-x 1 root root 121976 2005-06-01 08:03 /usr/bin/X11/xf86config
However, I think xf86config and XF86Setup are different tools. The first one is text-based and the latter is supposed to provide some kind of interface??!