diff -Naur squirrelmail-1.4.9a/functions/forms.php squirrelmail-1.4.9a.oden/functions/forms.php
--- squirrelmail-1.4.9a/functions/forms.php	2006-04-15 00:27:07.000000000 +0200
+++ squirrelmail-1.4.9a.oden/functions/forms.php	2006-12-05 14:36:25.000000000 +0100
@@ -41,7 +41,8 @@
  */
 function addCheckBox($name, $checked = false, $value = null) {
     return addInputField('checkbox', $name, $value,
-        ($checked ? ' checked="checked"' : ''));
+        concat_hook_function('list_checkbox_extra_params',array($name,false)).' '.
+	($checked ? ' checked="checked"' : ''));
 }
 
 /**
diff -Naur squirrelmail-1.4.9a/functions/mailbox_display.php squirrelmail-1.4.9a.oden/functions/mailbox_display.php
--- squirrelmail-1.4.9a/functions/mailbox_display.php	2006-10-20 10:59:34.000000000 +0200
+++ squirrelmail-1.4.9a.oden/functions/mailbox_display.php	2006-12-05 14:34:40.000000000 +0100
@@ -205,7 +205,7 @@
             case 1: /* checkbox */
                 echo html_tag( 'td',
                                "<input type=\"checkbox\" name=\"msg[$t]\" id=\"msg".$msg['ID'].
-                                   "\" value=\"".$msg['ID']."\"$checked>",
+                                   "\" value=\"".$msg['ID']."\"$checked ".concat_hook_function('list_checkbox_extra_params',array("msg[$t]",true)).">",
                                'center',
                                $hlt_color );
                 break;
@@ -964,6 +964,8 @@
         $result .= "</A>\n";
     }
 
+    $result .= concat_hook_function('mailbox_selectall_after');
+
     /* Return our final result. */
     return ($result);
 }
diff -Naur squirrelmail-1.4.9a/src/addressbook.php squirrelmail-1.4.9a.oden/src/addressbook.php
--- squirrelmail-1.4.9a/src/addressbook.php	2006-10-07 13:58:42.000000000 +0200
+++ squirrelmail-1.4.9a.oden/src/addressbook.php	2006-12-05 14:37:21.000000000 +0100
@@ -362,9 +362,11 @@
 
     echo html_tag( 'p', '<a href="#AddAddress">' . _("Add address") . '</a>', 'center' ) . "\n";
 
+    do_hook('addressbook_before_list');    
+
     /* List addresses */
     if (count($alist) > 0) {
-        echo addForm($form_url, 'post');
+        echo addForm($form_url, 'post', 'FormAddrsAbook');
         if ($abook->add_extra_field) {
             $abook_fields = 6;
         } else {