I forgot this in my previous mail:

You'll notice that the .tgz files from the Linux slackware distribution
use /usr/X11R6 as the X root directory, while others use /usr/X11.
Often, one is a link to the other. It doesn't matter really, just
make /emul/linux/usr/X11 a link to /emul/linux/usr/X11R6 or vice versa,
or just use one of them consistently.

Good luck,

Frank

P.S. Another nice thing to try is Executor, a Mac emulator that runs
     under Linux, and flawlessly under Linux compat mode as far as I
     have tried it. You'll need the newer X11R6 libs for it, see
     slakware/x9/xf_lib.tgz in a Slackware distribution dir.
     Emulating a Mac while emulating Linux on NetBSD, what a concept..