--- a/documentation/INSTALL.txt	Wed Apr 15 07:58:32 2009 +0000
+++ b/documentation/INSTALL.txt	Mon Apr 20 09:49:37 2009 +0000
@@ -45,18 +45,22 @@
    the ad_report module.
     (Goto :: administer >> modules :: then put a check next to 'ad_report')
 
-7) Assign the 'show advertisements' permission to all roles that you wish to
+7) If you wish to filter out duplicate clicks and other invalid clicks (as
+   detailed in the README), enable the click_filter module.
+    (Goto :: administer >> modules :: then put a check next to 'click_filter')
+
+8) Assign the 'show advertisements' permission to all roles that you wish to
    see advertisements.
     (Goto :: administer >> user management >> access control :: then put a
      check next to 'show advertisements' for all roles that should see ads)
 
-8) You can display ads in blocks by going to administer >> blocks and enabling
+9) You can display ads in blocks by going to administer >> blocks and enabling
    the per-ad-group blocks that are automatically generated.
 
-9) Optionally configure an input filter for your advertisements that allow
-   the html tags to display correctly.
-    (Goto :: administer >> site configuration >> input filters)
-   If you need to associate a specific input filter with the advertisement
-   content type, you may want to review the following projects:
+10) Optionally configure an input filter for your advertisements that allow
+    the html tags to display correctly.
+     (Goto :: administer >> site configuration >> input filters)
+    If you need to associate a specific input filter with the advertisement
+    content type, you may want to review the following projects:
       http://drupal.org/project/better_formats
       http://drupal.org/project/filterbynodetype