diff -urN wine-0.9.54_org/dlls/advapi32/advapi32.spec wine-0.9.54/dlls/advapi32/advapi32.spec
--- wine-0.9.54_org/dlls/advapi32/advapi32.spec	2008-01-25 17:05:38.000000000 +0100
+++ wine-0.9.54/dlls/advapi32/advapi32.spec	2008-02-05 23:42:46.000000000 +0100
@@ -499,7 +499,7 @@
 @ stdcall RegOpenKeyExW(long wstr long long ptr)
 @ stdcall RegOpenKeyW(long wstr ptr)
 @ stdcall RegOpenUserClassesRoot(ptr long long ptr)
-@ stub RegOverridePredefKey
+@ stdcall RegOverridePredefKey(long long)
 @ stdcall RegQueryInfoKeyA(long ptr ptr ptr ptr ptr ptr ptr ptr ptr ptr ptr)
 @ stdcall RegQueryInfoKeyW(long ptr ptr ptr ptr ptr ptr ptr ptr ptr ptr ptr)
 @ stdcall RegQueryMultipleValuesA(long ptr long ptr ptr)
diff -urN wine-0.9.54_org/dlls/advapi32/registry.c wine-0.9.54/dlls/advapi32/registry.c
--- wine-0.9.54_org/dlls/advapi32/registry.c	2008-01-25 17:05:38.000000000 +0100
+++ wine-0.9.54/dlls/advapi32/registry.c	2008-02-05 23:42:46.000000000 +0100
@@ -2408,6 +2408,31 @@
 }
 
 /******************************************************************************
+ * RegOverridePredefKey [ADVAPI32.@]
+ *
+ * Map a predefined key to another key.
+ *
+ * PARAMS
+ *  hkey     [I] Handle of a key to map, could be:
+ *               HKEY_CLASSES_ROOT / HKEY_CURRENT_CONFIG / HKEY_CURRENT_USER / HKEY_LOCAL_MACHINE / HKEY_PERFORMANCE_DATA / HKEY_USERS
+ *  hNewHKey [I] Handle to an open key hkey is mapped to.
+ *               RegOverridePredefKey restores the original mapping, if NULL is given
+ *
+ * RETURNS
+ *  Success: ERROR_SUCCESS
+ *  Failure: nonzero error code from Winerror.h
+ * 
+ * FIXME
+ *  function must be implemented
+ */
+
+LSTATUS WINAPI RegOverridePredefKey(HKEY hKey, HKEY hNewHKey)
+{
+    FIXME("(%p, %p) stub\n", hKey, hNewHKey);
+    return ERROR_CALL_NOT_IMPLEMENTED;
+}
+
+/******************************************************************************
  * load_string [Internal]
  *
  * This is basically a copy of user32/resource.c's LoadStringW. Necessary to
diff -urN wine-0.9.54_org/include/winreg.h wine-0.9.54/include/winreg.h
--- wine-0.9.54_org/include/winreg.h	2008-01-25 17:05:38.000000000 +0100
+++ wine-0.9.54/include/winreg.h	2008-02-05 23:44:46.000000000 +0100
@@ -143,6 +143,7 @@
 WINADVAPI LSTATUS   WINAPI RegOpenKeyExA(HKEY,LPCSTR,DWORD,REGSAM,PHKEY);
 #define                    RegOpenKeyEx WINELIB_NAME_AW(RegOpenKeyEx)
 WINADVAPI LSTATUS   WINAPI RegOpenUserClassesRoot(HANDLE,DWORD,REGSAM,PHKEY);
+WINADVAPI LSTATUS   WINAPI RegOverridePredefKey(HKEY,HKEY);
 WINADVAPI LSTATUS   WINAPI RegQueryInfoKeyW(HKEY,LPWSTR,LPDWORD,LPDWORD,LPDWORD,LPDWORD,LPDWORD,LPDWORD,LPDWORD,LPDWORD,LPDWORD,LPFILETIME);
 WINADVAPI LSTATUS   WINAPI RegQueryInfoKeyA(HKEY,LPSTR,LPDWORD,LPDWORD,LPDWORD,LPDWORD,LPDWORD,LPDWORD,LPDWORD,LPDWORD,LPDWORD,LPFILETIME);
 #define                    RegQueryInfoKey WINELIB_NAME_AW(RegQueryInfoKey)