No worries - however, in tthe words of the wise "This is not a good idea". I have a fairly specific reason for doing this.
You need to collect the following packages in to the one directory. If you have the "Dev tools" installed you will already have cpp.
chkfontpath-1.10.0-2.i386.rpm
cpp-3.4.3-22.1.i386.rpm
xinitrc-4.0.14-1.noarch.rpm
fonts-xorg-100dpi-6.8.1.1-1.EL.1.noarch.rpm
fonts-xorg-75dpi-6.8.1.1-1.EL.1.noarch.rpm
xorg-x11-6.8.2-1.EL.13.6.i386.rpm
fonts-xorg-base-6.8.1.1-1.EL.1.noarch.rpm
xorg-x11-font-utils-6.8.2-1.EL.13.6.i386.rpm
xorg-x11-xauth-6.8.2-1.EL.13.6.i386.rpm
xorg-x11-xfs-6.8.2-1.EL.13.6.i386.rpm
switchdesk-4.0.6-3.noarch.rpm
ttmkfdir-3.0.9-14.i386.rpm
xterm-192-1.i386.rpm
libungif-4.1.3-1.i386.rpm
from
hereAnd WindowMaker-0.80.2-6.i386.rpm from
hererpm -ivh *.rpm
Xorg -configure
mv /root/xorg.conf.new /etc/X11/xorg.conf
Edit /etc/X11/xorg.conf and fix up the mouse line (should be /dev/input/mouse0 for a ps2 mouse)
switchdesk Windowmaker
startx
Hopefully that should do it. Works on my setup.