--- a/INSTALL	Mon Oct 24 10:07:42 2005 +0000
+++ b/INSTALL	Mon Oct 24 20:39:47 2005 +0000
@@ -74,16 +74,17 @@
 
 Decide which libraries you would like to use with XEmacs, but are not
 yet available on your system.  On some systems, X11, Motif and CDE are
-optional additions.  On MacOS/X systems, you may download X11R6 for
-Mac OS X from http://www.apple.com/macosx/x11/download/.  You need
-both the runtime libraries and the SDK (in a sidebar of that page at
-the time of writing).  There is also a 3rd-party implementation of
-X11R6 for the Mac at http://www.xdarwin.org/.  On Solaris, the
-SUNWaudmo package enables native sound support.  There are also a
-number of free software applications that XEmacs can use.  If these
-are not yet available on your system, obtain, build and install those
-external libraries before building XEmacs.  The libraries XEmacs can
-use are:
+optional additions.  On MacOS/X systems prior to 10.2, you may download
+X11R6 for Mac OS X from http://www.apple.com/macosx/x11/download/.  In
+later releases X11 is available as an optional package on the
+installation CDs.  In either case you need both the runtime libraries
+and the SDK (in a sidebar of that page at the time of writing).  There
+is also a 3rd-party implementation of X11R6 for the Mac at
+http://www.xdarwin.org/.  On Solaris, the SUNWaudmo package enables
+native sound support.  There are also a number of free software
+applications that XEmacs can use.  If these are not yet available on
+your system, obtain, build and install those external libraries before
+building XEmacs.  The libraries XEmacs can use are:
 
    Xaw3d, XPM, JPEG, compface, PNG, zlib, GNU DBM, Berkeley DB, socks,
    term, NAS, Canna, Kinput2, SJ3, Wnn, PostgreSQL, LDAP.
@@ -138,6 +139,12 @@
 
     ./configure [CONFIGURATION-NAME] [--OPTION[=VALUE]] ...
 
+Options are generally of the form `--with-FEATURE' or
+`--enable-FEATURE' to use a feature or `--without-FEATURE' or
+`--disable-FEATURE' to not use a feature.  Unlike the `configure'
+program used in other applications, either `--with-FEATURE' or
+`--enable-FEATURE' can be used to use the same feature.
+
 Controlling the Host Type
 -------------------------