Index: /trunk/doc/manual/en_US/user_Introduction.xml
===================================================================
--- /trunk/doc/manual/en_US/user_Introduction.xml	(revision 35089)
+++ /trunk/doc/manual/en_US/user_Introduction.xml	(revision 35090)
@@ -69,6 +69,6 @@
         solution on a real machine can be a tedious task. With VirtualBox,
         such a complex setup (then often called an "appliance") can be packed
-        into a virtual machine. Installing and running a mail server
-        becomes as easy as importing such an appliance into VirtualBox.</para>
+        into a virtual machine. Installing and running a mail server becomes
+        as easy as importing such an appliance into VirtualBox.</para>
       </listitem>
 
@@ -503,12 +503,12 @@
 
   <sect1 id="intro-installing">
-    <title>Installing VirtualBox</title>
+    <title>Installing VirtualBox and extension packs</title>
 
     <para>VirtualBox comes in many different packages, and installation
-    depends on your host platform. If you have installed software before,
-    installation should be straightforward: on each host platform, VirtualBox
-    uses the installation method that is most common and easy to use. If you
-    run into trouble or have special requirements, please refer to <xref
-    linkend="installation" /> for details about the various installation
+    depends on your host operating system. If you have installed software
+    before, installation should be straightforward: on each host platform,
+    VirtualBox uses the installation method that is most common and easy to
+    use. If you run into trouble or have special requirements, please refer to
+    <xref linkend="installation" /> for details about the various installation
     methods.</para>
 
@@ -516,5 +516,5 @@
     components.<orderedlist>
         <listitem>
-          <para>The base package consists of all open source components and is
+          <para>The base package consists of all open-source components and is
           licensed under the GNU General Public License V2.</para>
         </listitem>
@@ -543,7 +543,18 @@
 
           <para>VirtualBox extension packages have a
-          <computeroutput>.vbox-extpack</computeroutput> file name extension. To
-          install an extension, simply double-click on package file, and the
-          VirtualBox Manager will guide you through the required steps.</para>
+          <computeroutput>.vbox-extpack</computeroutput> file name extension.
+          To install an extension, simply double-click on the package file,
+          and the VirtualBox Manager will guide you through the required
+          steps. </para>
+
+          <para>To view the extension packs that are currently installed,
+          please start the VirtualBox Manager (see the next section). From the
+          "File" menu, please select "Preferences". In the window that shows
+          up, go to the "Extensions" category which shows you the extensions
+          which are currently installed and allows you to remove a package or
+          add a new one.</para>
+
+          <para>Alternatively you can use VBoxManage on the command line: see
+          <xref linkend="vboxmanage-extpack" /> for details.</para>
         </listitem>
       </orderedlist></para>
@@ -815,5 +826,5 @@
 
     <sect2>
-      <title>Starting a VM for the first time</title>
+      <title>Starting a new VM for the first time</title>
 
       <para>When a VM gets started for the first time, another wizard -- the
@@ -1257,6 +1268,6 @@
             snapshots. By restoring a snapshot, you go back (or forward) in
             time: the current state of the machine is lost, and the machine is
-            restored to exactly the same state as it was when the snapshot
-            was taken.<footnote>
+            restored to exactly the same state as it was when the snapshot was
+            taken.<footnote>
                 <para>Both the terminology and the functionality of restoring
                 snapshots has changed with VirtualBox 3.1. Before that
@@ -1455,6 +1466,6 @@
       </orderedlist></para>
 
-    <para>To <emphasis role="bold">import</emphasis> an appliance in one of the
-    above formats, simply double-click on the OVF/OVA file.<footnote>
+    <para>To <emphasis role="bold">import</emphasis> an appliance in one of
+    the above formats, simply double-click on the OVF/OVA file.<footnote>
         <para>Starting with version 4.0, VirtualBox creates file type
         associations for OVF and OVA files on your host operating
Index: /trunk/doc/manual/en_US/user_VBoxManage.xml
===================================================================
--- /trunk/doc/manual/en_US/user_VBoxManage.xml	(revision 35089)
+++ /trunk/doc/manual/en_US/user_VBoxManage.xml	(revision 35090)
@@ -177,14 +177,4 @@
 
         <listitem>
-          <para><computeroutput>hdds</computeroutput>,
-          <computeroutput>dvds</computeroutput> and
-          <computeroutput>floppies</computeroutput> all give you information
-          about virtual disk images currently registered in VirtualBox,
-          including all their settings, the unique identifiers (UUIDs)
-          associated with them by VirtualBox and all files associated with
-          them.</para>
-        </listitem>
-
-        <listitem>
           <para><computeroutput>ostypes</computeroutput> lists all guest
           operating systems presently known to VirtualBox, along with the
@@ -195,8 +185,17 @@
         <listitem>
           <para><computeroutput>hostdvds</computeroutput>,
-          <computeroutput>hostfloppies</computeroutput> and
-          <computeroutput>hostifs</computeroutput>, respectively, list DVD,
-          floppy and host networking interfaces on the host, along with the
-          name used to access them from within VirtualBox.</para>
+          <computeroutput>hostfloppies</computeroutput>, respectively, list
+          DVD, floppy, bridged networking and host-only networking interfaces
+          on the host, along with the name used to access them from within
+          VirtualBox.</para>
+        </listitem>
+
+        <listitem>
+          <para><computeroutput>bridgedifs</computeroutput>,
+          <computeroutput>hostonlyifs</computeroutput> and
+          <computeroutput>dhcpservers</computeroutput>, respectively, list
+          bridged network interfaces, host-only network interfaces and DHCP
+          servers currently available on the host. Please see <xref
+          linkend="networkingdetails" /> for details on these.</para>
         </listitem>
 
@@ -216,4 +215,22 @@
 
         <listitem>
+          <para><computeroutput>hdds</computeroutput>,
+          <computeroutput>dvds</computeroutput> and
+          <computeroutput>floppies</computeroutput> all give you information
+          about virtual disk images currently in use by VirtualBox, including
+          all their settings, the unique identifiers (UUIDs) associated with
+          them by VirtualBox and all files associated with them. This is the
+          command-line equivalent of the Virtual Media Manager; see <xref
+          linkend="vdis" />.</para>
+        </listitem>
+
+        <listitem>
+          <para><computeroutput>hddbackends</computeroutput> lists all known
+          virtual disk back-ends of VirtualBox. For each such format (such as
+          VDI, VMDK or RAW), this lists the back-end's capabilities and
+          configuration.</para>
+        </listitem>
+
+        <listitem>
           <para><computeroutput>systemproperties</computeroutput> displays
           some global VirtualBox settings, such as minimum and maximum guest
@@ -223,8 +240,8 @@
 
         <listitem>
-          <para><computeroutput>hddbackends</computeroutput> lists all known
-          virtual disk back-ends of VirtualBox. For each such format (such as
-          VDI, VMDK or RAW), this lists the back-end's capabilities and
-          configuration.</para>
+          <para><computeroutput>extpacks</computeroutput> displays all
+          VirtualBox extension packs currently installed; see <xref
+          linkend="intro-installing" /> and <xref
+          linkend="vboxmanage-extpack" /> for more information.</para>
         </listitem>
       </itemizedlist></para>
@@ -2675,5 +2692,6 @@
 
                 <glossdef>
-                  <para>Enables following symlinks on the host's source.</para>
+                  <para>Enables following symlinks on the host's
+                  source.</para>
                 </glossdef>
               </glossentry>
@@ -2683,5 +2701,6 @@
 
                 <glossdef>
-                  <para>Recursively copies files/directories of the specified source.</para>
+                  <para>Recursively copies files/directories of the specified
+                  source.</para>
                 </glossdef>
               </glossentry>
@@ -2707,6 +2726,6 @@
 
         <listitem>
-          <para><computeroutput>createdirectory</computeroutput>, which allows copying
-          files from the host to the guest (only with installed Guest
+          <para><computeroutput>createdirectory</computeroutput>, which allows
+          copying files from the host to the guest (only with installed Guest
           Additions 4.0 and later).</para>
 
@@ -2729,10 +2748,11 @@
 
                 <glossdef>
-                  <para>Absolute path of directory/directories to create on guest, e.g.
-                  <computeroutput>D:\Foo\Bar</computeroutput>. Parent directories
-                  need to exist (e.g. in this example <computeroutput>D:\Foo</computeroutput>)
-                  when switch <computeroutput>--parents</computeroutput> is omitted. The
-                  specified user must have appropriate rights to create the specified
-                  directory.</para>
+                  <para>Absolute path of directory/directories to create on
+                  guest, e.g. <computeroutput>D:\Foo\Bar</computeroutput>.
+                  Parent directories need to exist (e.g. in this example
+                  <computeroutput>D:\Foo</computeroutput>) when switch
+                  <computeroutput>--parents</computeroutput> is omitted. The
+                  specified user must have appropriate rights to create the
+                  specified directory.</para>
                 </glossdef>
               </glossentry>
@@ -2761,9 +2781,11 @@
 
                 <glossdef>
-                  <para>Also creates not yet existing parent directories of the
-                  specified directory, e.g. if the directory <computeroutput>D:\Foo</computeroutput>
-                  of <computeroutput>D:\Foo\Bar</computeroutput> does not exist yet it will
-                  be created. Without specifying <computeroutput>--parent</computeroutput> the
-                  action would have failed.</para>
+                  <para>Also creates not yet existing parent directories of
+                  the specified directory, e.g. if the directory
+                  <computeroutput>D:\Foo</computeroutput> of
+                  <computeroutput>D:\Foo\Bar</computeroutput> does not exist
+                  yet it will be created. Without specifying
+                  <computeroutput>--parent</computeroutput> the action would
+                  have failed.</para>
                 </glossdef>
               </glossentry>
@@ -2773,6 +2795,8 @@
 
                 <glossdef>
-                  <para>Sets the permission mode of the specified directory. Only octal
-                  modes (e.g. <computeroutput>0755</computeroutput>) are supported right now.</para>
+                  <para>Sets the permission mode of the specified directory.
+                  Only octal modes (e.g.
+                  <computeroutput>0755</computeroutput>) are supported right
+                  now.</para>
                 </glossdef>
               </glossentry>
@@ -2785,5 +2809,4 @@
                 </glossdef>
               </glossentry>
-
             </glosslist></para>
         </listitem>
@@ -2905,3 +2928,34 @@
     network or host-only interface name.</para>
   </sect1>
+
+  <sect1 id="vboxmanage-extpack">
+    <title>VBoxManage extpack</title>
+
+    <para>The "extpack" command allows you to add or remove VirtualBox
+    extension packs, as described in <xref
+    linkend="intro-installing" />.<itemizedlist>
+        <listitem>
+          <para>To add a new extension pack, use <computeroutput>VBoxManage
+          extpack install &lt;tarball&gt;</computeroutput>. </para>
+        </listitem>
+
+        <listitem>
+          <para>To remove a previously installed extension pack, use
+          <computeroutput>VBoxManage extpack uninstall
+          &lt;name&gt;</computeroutput>. You can use
+          <computeroutput>VBoxManage list extpacks</computeroutput> to show
+          the names of the extension packs which are currently installed;
+          please see <xref linkend="vboxmanage-list" /> also. The optional
+          <computeroutput>--force</computeroutput> parameter can be used to
+          override the refusal of an extension pack to be uninstalled.</para>
+        </listitem>
+
+        <listitem>
+          <para>The <computeroutput>VBoxManage extpack
+          cleanup</computeroutput> command can be used to remove temporary
+          files and directories that may have been left behind if a previous
+          install or uninstall command failed.</para>
+        </listitem>
+      </itemizedlist></para>
+  </sect1>
 </chapter>
