Updated JBoss Freemarker IDE related information
diff --git a/src/main/docgen/book.xml b/src/main/docgen/book.xml
index 8ab8e1a..6284ec2 100644
--- a/src/main/docgen/book.xml
+++ b/src/main/docgen/book.xml
@@ -375,26 +375,39 @@
 
             <td><para>This is developed as part of <link
             xlink:href="http://tools.jboss.org/">JBoss
-            Tools</link>.</para><para>On Eclipse <emphasis>Neon</emphasis> or
-            later, go to <quote>Help</quote> / <quote>Eclipse
-            Marketplace...</quote>, search for <quote>JBoss Tools</quote>
-            (should give version 4.<emphasis role="bold">4</emphasis>.1 or
-            later), <quote>Install</quote>. A tree of check boxes will appear,
-            uncheck all (by unchecking the root) except <quote>FreeMarker
-            IDE</quote>.</para><para>On Eclipse <emphasis>Mars or
-            Luna</emphasis>, you should still install the <quote>FreeMarker
-            IDE</quote> plugin from JBoss Tool 4.<emphasis
-            role="bold">4</emphasis>.1 or later, but the Eclipse Marketplace
-            won't show it. So in Eclipse, go to <quote>Help</quote> /
-            <quote>Install New Software...</quote>, and copy-paste
-            http://download.jboss.org/jbosstools/neon/stable/updates/ into the
-            <quote>Work with</quote> field. While this URL is for Eclipse
-            Neon, the <quote>FreeMarker IDE</quote> component under it works
-            on Eclipse Mars too (maybe even on Luna). So expand the check box
-            tree appearing below, and select <quote>FreeMarker IDE</quote>
-            only. Don't left any other components checked. Then
-            <quote>Next</quote>, <quote>Next</quote>,
-            <quote>Finish</quote>.</para><para>Report bugs found on the <link
+            Tools</link>.</para><para>On <emphasis>Eclipse Oxygen</emphasis>
+            (starting from JBoss Tools 4.5.1): Go to <quote>Help</quote> /
+            <quote>Eclipse Marketplace...</quote>, search for <quote>JBoss
+            Tools</quote>, <quote>Install</quote>. A tree of check boxes will
+            appear, uncheck all (by unchecking the root) except <quote>JBoss
+            Central Community</quote>. After installing that, in the Red Hat
+            Central tab (if it's not already open, click the Red Hat icon on
+            the toolbar), on that click the <quote>Add Tools</quote> icon (it
+            looks like a bunch of tools), and there check out
+            <quote>Freemarker IDE</quote>, and press
+            <quote>Install/Update</quote> at the bottom.</para><para>On
+            <emphasis>Eclipse Neon</emphasis>, go to <quote>Help</quote> /
+            <quote>Eclipse Marketplace...</quote>, search for <quote>JBoss
+            Tools</quote> (should give version 4.<emphasis
+            role="bold">4</emphasis>.x), <quote>Install</quote>. A tree of
+            check boxes will appear, uncheck all (by unchecking the root)
+            except <quote>FreeMarker IDE</quote>.</para><para><emphasis>On
+            older Eclipse versions</emphasis> such as <emphasis>Mars and
+            Luna</emphasis>, the Marketplace only offers JBoss Tools versions
+            in which the FreeMarker support is way too old. But you can
+            install a newer <quote>FreeMarker IDE</quote> manually, and try if
+            it works on your older Eclipse version. The versions made for
+            Eclipse Neon has worked fine on Mars. In Eclipse, go to
+            <quote>Help</quote> / <quote>Install New Software...</quote>, and
+            copy-paste
+            http://download.jboss.org/jbosstools/neon/stable/updates/ (or even
+            http://download.jboss.org/jbosstools/oxygen/stable/updates/) into
+            the <quote>Work with</quote> field. In the text filter field below
+            start to type <quote>freemarker</quote> (or expand the check box
+            tree appearing below), and select <quote>FreeMarker IDE</quote>.
+            Be sure no other components was checked. Then <quote>Next</quote>,
+            <quote>Next</quote>, <quote>Finish</quote>.</para><para>Report
+            bugs found on the <link
             xlink:href="https://issues.jboss.org/issues/?jql=project%20%3D%20JBIDE%20AND%20component%20%3D%20freemarker">bug
             tracker of the JBoss Tools project</link> (Key:
             <literal>JBIDE</literal>; Component:
@@ -403,14 +416,13 @@
             xlink:href="https://github.com/jbosstools/jbosstools-freemarker">on
             GitHub</link>!</para><para>To install the nightly development
             version, use this Eclipse update site:
-            http://download.jboss.org/jbosstools/neon/snapshots/builds/jbosstools-freemarker_master/latest/all/repo/
+            http://download.jboss.org/jbosstools/oxygen/snapshots/builds/jbosstools-freemarker_master/latest/all/repo/
             </para><para>Note: If the plugin comes with an older FreeMarker
             version than the one your application uses, it will mark the usage
-            of too fresh language features as errors, or the other way around.
-            To fix this, find <literal>freemarker*.jar</literal> inside the
-            installed plugin, under
-            <literal>&lt;userHome&gt;/.eclipse/</literal> or under the Eclipse
-            installation directory (you may need to search inside
+            of too fresh language features as errors. To fix this, find
+            <literal>freemarker*.jar</literal> inside the installed plugin,
+            under <literal>&lt;userHome&gt;/.eclipse/</literal> or under the
+            Eclipse installation directory (you may need to search inside
             <literal>jar</literal>-s). Exit Eclipse, and overwrite it with the
             <literal>freemarker.jar</literal> you want, but keep the file name
             of the replaced <literal>jar</literal>. You may also need to find