Index: /trunk/src/VBox/Additions/Makefile.kmk
===================================================================
--- /trunk/src/VBox/Additions/Makefile.kmk	(revision 46691)
+++ /trunk/src/VBox/Additions/Makefile.kmk	(revision 46692)
@@ -232,4 +232,5 @@
 	OS2/VBoxService.exe=$(VBOX_PATH_ADDITIONS.os2.x86)/VBoxService.exe \
 	OS2/VBoxControl.exe=$(VBOX_PATH_ADDITIONS.os2.x86)/VBoxControl.exe \
+	OS2/VBoxReplaceDll.exe=$(VBOX_PATH_ADDITIONS.os2.x86)/VBoxReplaceDll.exe \
 	OS2/libc06.dll=$(VBOX_PATH_ADDITIONS.os2.x86)/libc06.dll \
 	OS2/libc061.dll=$(VBOX_PATH_ADDITIONS.os2.x86)/libc061.dll \
Index: /trunk/src/VBox/Additions/os2/Makefile.kmk
===================================================================
--- /trunk/src/VBox/Additions/os2/Makefile.kmk	(revision 46691)
+++ /trunk/src/VBox/Additions/os2/Makefile.kmk	(revision 46692)
@@ -35,4 +35,14 @@
 #include $(PATH_SUB_CURRENT)/VBoxSF/Makefile.kmk
 
+
+#
+# Installation helper.
+#
+PROGRAMS += VBoxReplaceDll
+VBoxReplaceDll_TEMPLATE = NewVBoxGuestR3Exe
+VBoxReplaceDll_SOURCES = VBoxReplaceDll.cpp
+
+
+
 include $(FILE_KBUILD_SUB_FOOTER)
 
Index: /trunk/src/VBox/Additions/os2/VBoxReplaceDll.cpp
===================================================================
--- /trunk/src/VBox/Additions/os2/VBoxReplaceDll.cpp	(revision 46692)
+++ /trunk/src/VBox/Additions/os2/VBoxReplaceDll.cpp	(revision 46692)
@@ -0,0 +1,104 @@
+/** $Id$ */
+/** @file
+ * VBoxSF - OS/2 Shared Folders, the FS and FSD level IFS EPs
+ */
+
+/*
+ * Copyright (C) 2013 Oracle Corporation
+ *
+ * This file is part of VirtualBox Open Source Edition (OSE), as
+ * available from http://www.virtualbox.org. This file is free software;
+ * you can redistribute it and/or modify it under the terms of the GNU
+ * General Public License (GPL) as published by the Free Software
+ * Foundation, in version 2 as it comes in the "COPYING" file of the
+ * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
+ * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
+ */
+
+
+/*******************************************************************************
+*   Header Files                                                               *
+*******************************************************************************/
+#define INCL_BASE
+#include <os2.h>
+#include <stdio.h>
+#include <string.h>
+
+                             
+static int usage(const char *argv0)
+{
+    char *psz1 = strrchr(argv0, '\\');
+    if (psz1)
+        argv0 = psz1 + 1;
+    psz1 = strrchr(argv0, '/');
+    if (psz1)
+        argv0 = psz1 + 1;
+    psz1 = strrchr(argv0, ':');
+    if (psz1)
+        argv0 = psz1 + 1;
+
+    printf("Usage: %s <dll1> [dll2 ...[dllN]]\n"
+           "\n"
+           "Tells the kernel to cache the specified DLLs in memory and close the\n"
+           "files on disk, allowing new DLL versions to be installed.\n"
+           "\n"
+           "Copyright (C) 2013 Oracle Corporation\n", 
+           argv0);
+    return 0;
+}
+
+int main(int argc, char **argv)
+{
+    int fOptions   = 1;
+    int cProcessed = 0;
+    int i;
+    for (i = 1; i < argc; i++)
+    {
+        if (   fOptions 
+            && argv[i][0] == '-')
+        {
+            if (!strcmp(argv[i], "--"))
+                fOptions = 0;
+            else if (   !strcmp(argv[i], "--help")
+                     || !strcmp(argv[i], "-help")
+                     || !strcmp(argv[i], "-h")
+                     || !strcmp(argv[i], "-?") )
+                return usage(argv[0]);
+            else if (   !strcmp(argv[i], "--version")
+                     || !strcmp(argv[i], "-V") )
+            {
+                printf("$Revision$\n");
+                return 0;
+            }
+            else
+            {
+                fprintf(stderr, "syntax error: Invalid option '%s'!\n", argv[i]);
+                return 2;
+            }
+        }
+        else
+        {
+            /* 
+             * Replace the specified DLL.
+             */
+            APIRET rc = DosReplaceModule((PCSZ)argv[i], NULL, NULL);
+            if (rc == NO_ERROR)
+                printf("info: Successfully cached '%s'.\n", argv[i]);
+            else
+            {
+                fprintf(stderr, "error: DosReplaceModule failed with rc=%u on  '%s'.\n", rc, argv[i]);
+                return 1;
+            }
+            cProcessed++;
+        }
+    }
+
+    if (cProcessed == 0)
+    {
+        fprintf(stderr, "syntax error: No DLLs specified. (Consult --help for usage.)\n");
+        return 1;
+    }
+
+    return 0;
+}
+