diff -uNrp 1/x264vfw/config.c 2/x264vfw/config.c
--- 1/x264vfw/config.c	2008-11-03 10:22:56 +0200
+++ 2/x264vfw/config.c	2008-11-10 14:20:06 +0200
@@ -866,6 +866,9 @@ void tabs_update_items(CONFIG *config)
     CheckDlgButton(hMainDlg, IDC_CONFIG_USE_CMDLINE, config->b_use_cmdline);
     SendMessage(GetDlgItem(hMainDlg, IDC_CONFIG_CMDLINE), EM_LIMITTEXT, MAX_CMDLINE - 1, 0);
     SetDlgItemText(hMainDlg, IDC_CONFIG_CMDLINE, config->cmdline);
+#if X264VFW_USE_EXTERNAL_CONFIG
+    CheckDlgButton(hMainDlg, IDC_CONFIG_USE_EXTERNAL_GUI, 0);
+#endif
 }
 
 /* Assigns tooltips */
@@ -1000,6 +1003,19 @@ BOOL CALLBACK callback_main(HWND hDlg, U
                             EnableWindow(GetDlgItem(hMainDlg, IDC_CONFIG_CMDLINE), config->b_use_cmdline);
                             break;
 
+#if X264VFW_USE_EXTERNAL_CONFIG
+                        case IDC_CONFIG_USE_EXTERNAL_GUI:
+                        {
+                            HKEY    hKey;
+                            int     b_use_new_gui;
+                            b_use_new_gui = IsDlgButtonChecked(hMainDlg, IDC_CONFIG_USE_EXTERNAL_GUI);
+                            RegOpenKeyEx( HKEY_CURRENT_USER, "Software\\GNU\\x264", 0, KEY_WRITE, &hKey );
+                            RegSetValueEx(hKey, ".GUI.USE", 0, REG_DWORD, (LPBYTE)&b_use_new_gui, sizeof(int));
+                            RegCloseKey( hKey );
+                            break;
+                        }
+#endif
+
                         default:
                             return FALSE;
                     }
diff -uNrp 1/x264vfw/driverproc.c 2/x264vfw/driverproc.c
--- 1/x264vfw/driverproc.c	2008-11-03 10:22:56 +0200
+++ 2/x264vfw/driverproc.c	2008-11-10 14:18:24 +0200
@@ -71,6 +71,63 @@ static void log_callback(void* ptr, int 
 }
 #endif
 
+#if X264VFW_USE_EXTERNAL_CONFIG
+static int ConfigExternal(void)
+{
+    //Call External GUI
+    HKEY    hKey;
+    int  config_int_use;
+    char config_str_pth[1000];
+    char config_str_fun[1000];
+    DWORD   i_size;
+    typedef BOOL (WINAPI LPFUNC1)(void);
+    LPFUNC1* ConfigFunc = NULL;
+
+    i_size = sizeof(int);
+    RegOpenKeyEx( HKEY_CURRENT_USER, "Software\\GNU\\x264", 0, KEY_READ, &hKey );
+    if ( RegQueryValueEx( hKey, ".GUI.USE", 0, 0, (LPBYTE)&config_int_use, &i_size ) != ERROR_SUCCESS ) {
+        RegCloseKey( hKey );
+        return 0;
+    } else {
+        if ( config_int_use == 0 ) {
+            RegCloseKey( hKey );
+            return 0;
+        }
+        i_size = sizeof(config_str_pth);
+        if ( RegQueryValueEx( hKey, ".GUI.PATH", 0, 0, (LPBYTE)&config_str_pth, &i_size ) != ERROR_SUCCESS ) {
+            RegCloseKey( hKey );
+            return 0;
+        }
+        i_size = sizeof(config_str_fun);
+        if ( RegQueryValueEx( hKey, ".GUI.FUNC", 0, 0, (LPBYTE)&config_str_fun, &i_size ) != ERROR_SUCCESS ) {
+            RegCloseKey( hKey );
+            return 0;
+        }
+
+        static HINSTANCE hGUI; // handle to the preloaded GUI
+        hGUI = LoadLibraryA( (LPCTSTR)&config_str_pth );
+        if( hGUI == (HMODULE)NULL ) {
+            RegCloseKey( hKey );
+            return 0;
+        }
+        ConfigFunc = (LPFUNC1*)GetProcAddress((HMODULE)hGUI,(LPCSTR)&config_str_fun);
+        if ( ConfigFunc != NULL ) {
+            i_size = (*ConfigFunc)();
+        } else {
+            FreeLibrary( hGUI );
+            RegCloseKey( hKey );
+            return 0;
+        }
+        FreeLibrary( hGUI );
+        RegCloseKey( hKey );
+        return 1;
+    }
+    RegCloseKey(hKey);
+    return 0;
+}
+
+#endif
+
 /* This little puppy handles the calls which vfw programs send out to the codec */
 LRESULT WINAPI attribute_align_arg DriverProc(DWORD dwDriverId, HDRVR hDriver, UINT uMsg, LPARAM lParam1, LPARAM lParam2)
 {
@@ -195,6 +252,11 @@ LRESULT WINAPI attribute_align_arg Drive
                 codec->config.b_save = FALSE;
                 memcpy(&temp, &codec->config, sizeof(CONFIG));
 
+#if X264VFW_USE_EXTERNAL_CONFIG
+                if ( ConfigExternal() == 1 )
+                    config_reg_load(&codec->config);
+                else
+#endif
                 DialogBoxParam(g_hInst, MAKEINTRESOURCE(IDD_CONFIG), (HWND)lParam1, callback_main, (LPARAM)&temp);
 
                 if (temp.b_save)
diff -uNrp 1/x264vfw/resource.h 2/x264vfw/resource.h
--- 1/x264vfw/resource.h	2008-11-03 10:22:56 +0200
+++ 2/x264vfw/resource.h	2008-11-10 14:20:48 +0200
@@ -138,6 +138,10 @@
 #define IDC_VUI_CHROMALOC               1112
 #define IDC_VUI_CHROMALOC_SPIN          1113
 
+#if X264VFW_USE_EXTERNAL_CONFIG
+#define IDC_CONFIG_USE_EXTERNAL_GUI     1114
+#endif
+
 // Next default values for new objects
 // 
 #ifdef APSTUDIO_INVOKED
diff -uNrp 1/x264vfw/resource.rc 2/x264vfw/resource.rc
--- 1/x264vfw/resource.rc	2008-11-03 10:22:56 +0200
+++ 2/x264vfw/resource.rc	2008-11-10 14:21:33 +0200
@@ -82,7 +82,10 @@ FONT 8, "MS Shell Dlg", 400, 0, 0x1
 BEGIN
     DEFPUSHBUTTON   "OK",IDOK,426,314,66,12
     CONTROL         "",IDC_CONFIG_TABCONTROL,"SysTabControl32",TCS_MULTILINE | WS_TABSTOP,0,0,504,266
-    CONTROL         "Use command line:",IDC_CONFIG_USE_CMDLINE,"Button",BS_AUTOCHECKBOX | WS_TABSTOP,12,270,480,12
+    CONTROL         "Use command line:",IDC_CONFIG_USE_CMDLINE,"Button",BS_AUTOCHECKBOX | WS_TABSTOP,12,270,80,12
+#if X264VFW_USE_EXTERNAL_CONFIG
+    CONTROL         "Use external GUI",IDC_CONFIG_USE_EXTERNAL_GUI,"Button",BS_AUTOCHECKBOX | WS_TABSTOP,112,270,80,12
+#endif
     EDITTEXT        IDC_CONFIG_CMDLINE,12,286,480,24,ES_MULTILINE | ES_AUTOVSCROLL | WS_VSCROLL
     PUSHBUTTON      "Load Defaults",IDC_CONFIG_DEFAULTS,12,314,66,12
     PUSHBUTTON      "Cancel",IDCANCEL,342,314,66,12
diff -uNrp 1/x264vfw/x264vfw_config.h 2/x264vfw/x264vfw_config.h
--- 1/x264vfw/x264vfw_config.h	2008-11-03 10:22:56 +0200
+++ 2/x264vfw/x264vfw_config.h	2008-11-10 14:18:36 +0200
@@ -12,5 +12,6 @@
 #define X264_PATCH_HDR              0
 #define FFMPEG_HAVE_RGB24_FIXED     1
 #define FFMPEG_HAVE_IMG_CONVERT     1
+#define X264VFW_USE_EXTERNAL_CONFIG 1
 
 #endif