Rewrite Choose Distributions section in a more formal style.

Added markups for guibutton/guimenuitem.
Added xrefs to other relevant handbook sections.

Reviewed by:	murray

en_US.ISO8859-1/books/handbook/install/chapter.sgml

@@ -1,7 +1,7 @@
 <!--
      The FreeBSD Documentation Project
 
-     $FreeBSD: doc/en_US.ISO8859-1/books/handbook/install/chapter.sgml,v 1.97 2001/08/22 20:38:03 rpratt Exp $
+     $FreeBSD: doc/en_US.ISO8859-1/books/handbook/install/chapter.sgml,v 1.98 2001/08/24 13:39:00 rpratt Exp $
 -->
 
 <chapter id="install">
@@ -2091,14 +2091,38 @@ Mounting root from ufs:/dev/md0c
     <sect2 id="distset">
       <title>Select The Distribution Set</title>
 
-      <para>I chose to install everything using the "All" option since I
-	had the hard drive space. If you are concerned about space,
-	consider the other distribution options.</para>
+      <para>Deciding which distribution set to install will depend largely
+	on the intended use of the system and the amount of disk space
+	available.  The predefined options range from installing the
+	smallest possible configuration to everything.  Those who are
+	new to Unix and/or FreeBSD should almost certainly select one
+	of these canned options.  Customizing a distribution set is
+	typically for the more experienced user.</para>
 
-      <para>Select "All" using the arrow keys to highlight the item and
-	press the <emphasis>SPACEBAR</emphasis>. Notice that the
-	instructions below give pressing [Enter] as a means to
-	exit.</para>
+      <para>Press <keycap>F1</keycap> for more information on the 
+	distribution set options and what they contain.  When finished
+	reviewing the help, pressing <keycap>Enter</keycap> will return
+	to the Select Distributions Menu.</para>
+
+      <para>If a graphical user interface is desired then a distribution
+	set that is preceeded by an <literal>X</literal> should be
+	chosen.  The configuration of XFree86 and selection of a default
+	desktop is part of the post-installation steps.  For more
+	information on the XFree86 distribution see
+	<xref linkend="x11">.</para>
+
+      <para>If compiling a custom kernel is anticipated, select an option
+	which includes the source code.  For more information on why a
+	custom kernel should be built or how to build a custom kernel see
+	<xref linkend="kernelconfig">.</para>
+
+      <para>Obviously, the most versatile system is one that includes
+	everything.  If there is adequate disk space, select 
+	<guimenuitem>All</guimenuitem> as shown in
+	<xref linkend="distribution-set1"> by using the arrow keys and
+	press <keycap>ENTER</keycap>.  If there is a concern about disk
+	space consider using an option that is more suitable for the
+	situation.  Other distributions can be added after installation.</para>
 
       <figure id="distribution-set1">
 	<title>Choose Distributions</title>
@@ -2114,13 +2138,26 @@ Mounting root from ufs:/dev/md0c
     <sect2 id="portscol"
       <title>Installing The Ports Collection</title>
 
+      <para>After selecting the desired distribution, an opportunity to
+	install the FreeBSD Ports Collection is presented.  The ports
+	collection is an easy and convenient way to install software.
+	The ports collection does not contain the source code necessary
+	to compile the software.  It is a collection of files which
+	automates the downloading, compiling and installation.
+	<xref linkend="ports"> discusses how to use the ports
+	collection.</para>
+
+      <para>The installation program does not check to see if you have
+	adequate space.  Select this option only if you have
+	adequate hard disk space.</para>
+
 <screen>                         User Confirmation Requested
  Would you like to install the FreeBSD ports collection? 
 
  This will give you ready access to over 5000 ported software packages,
  at a cost of around 70MB of disk space when "clean" and possibly much
  more than that if a lot of the distribution tarballs are loaded
- (unless you have the extra CDs from a FreeBSD CDROM distribution
+ (unless you have the extra CDs from a FreeBSD CD/DVD distribution
  available and can mount it on /cdrom, in which case this is far less
  of a problem). 
 
@@ -2133,16 +2170,10 @@ Mounting root from ufs:/dev/md0c
 
                               [ Yes ]     No</screen>
 
-      <para>The installation program does not check to see if you have
-	adequate space.  Select this option only if you have
-	adequate hard disk space. The ports can be added as needed
-	later.</para>
-
-      <para>The install program <emphasis>returns</emphasis> to the
-	Choose Distributions screen.</para>
-
-      <para>Select "EXIT" with the arrow keys and press <keycap>Enter</keycap>
-	to continue with the installation.</para>
+      <para>Select <guibutton>[ Yes ]</guibutton> with the arrow keys to
+	install the ports collection or <guibutton>[ No ]</guibutton> to
+	skip this option.  Press <keycap>Enter</keycap> to continue.
+	The Choose Distributions menu will redisplay.</para>
 
       <figure id="distribution-set2">
 	<title>Confirm Distributions</title>
@@ -2153,6 +2184,12 @@ Mounting root from ufs:/dev/md0c
 	  </imageobject>
 	</mediaobject>
       </figure>
+
+      <para>If satisfied with the options, select
+	<guimenuitem>Exit</guimenuitem> with the arrow keys, ensure that
+	<guibutton>[ OK ]</guibutton> is highlighted, and press
+	<keycap>Enter</keycap> to continue.</para>
+
     </sect2>
 
   <sect2 id="install-media">