Index: /trunk/src/VBox/Frontends/VBoxManage/VBoxManageHelp.cpp
===================================================================
--- /trunk/src/VBox/Frontends/VBoxManage/VBoxManageHelp.cpp	(revision 44130)
+++ /trunk/src/VBox/Frontends/VBoxManage/VBoxManageHelp.cpp	(revision 44131)
@@ -506,5 +506,5 @@
                      "                            [--device <number>]\n"
                      "                            [--type dvddrive|hdd|fdd]\n"
-                     "                            [--medium none|emptydrive|\n"
+                     "                            [--medium none|emptydrive|additions|\n"
                      "                                      <uuid>|<filename>|host:<drive>|iscsi]\n"
                      "                            [--mtype normal|writethrough|immutable|shareable|\n"
Index: /trunk/src/VBox/Frontends/VBoxManage/VBoxManageStorageController.cpp
===================================================================
--- /trunk/src/VBox/Frontends/VBoxManage/VBoxManageStorageController.cpp	(revision 44130)
+++ /trunk/src/VBox/Frontends/VBoxManage/VBoxManageStorageController.cpp	(revision 44131)
@@ -102,4 +102,6 @@
     Bstr bstrPassword;
     Bstr bstrInitiator;
+    Bstr bstrIso;
+    Utf8Str strIso;
     bool fIntNet = false;
 
@@ -139,5 +141,5 @@
             }
 
-            case 'm':   // medium <none|emptydrive|uuid|filename|host:<drive>|iSCSI>
+            case 'm':   // medium <none|emptydrive|additions|uuid|filename|host:<drive>|iSCSI>
             {
                 if (ValueUnion.psz)
@@ -483,4 +485,15 @@
                         if (pszMedium)
                         {
+                            if (!RTStrICmp(pszMedium, "additions"))
+                            {
+                                ComPtr<ISystemProperties> pProperties;
+                                CHECK_ERROR(a->virtualBox,
+                                            COMGETTER(SystemProperties)(pProperties.asOutParam()));
+                                CHECK_ERROR(pProperties, COMGETTER(DefaultAdditionsISO)(bstrIso.asOutParam()));
+                                strIso = Utf8Str(bstrIso);
+                                pszMedium = strIso.c_str();
+                                if (devTypeRequested == DeviceType_Null)
+                                    devTypeRequested = DeviceType_DVD;
+                            }
                             ComPtr<IMedium> pExistingMedium;
                             rc = openMedium(a, pszMedium, deviceType,