Index: Include/pythonrun.h
===================================================================
--- Include/pythonrun.h	(revision 84913)
+++ Include/pythonrun.h	(working copy)
@@ -113,6 +113,7 @@
 PyAPI_FUNC(wchar_t *) Py_GetPrefix(void);
 PyAPI_FUNC(wchar_t *) Py_GetExecPrefix(void);
 PyAPI_FUNC(wchar_t *) Py_GetPath(void);
+PyAPI_FUNC(void)      Py_SetPath(const wchar_t *);
 
 /* In their own files */
 PyAPI_FUNC(const char *) Py_GetVersion(void);
Index: PC/getpathp.c
===================================================================
--- PC/getpathp.c	(revision 84913)
+++ PC/getpathp.c	(working copy)
@@ -79,6 +79,9 @@
  * The approach is an adaptation for Windows of the strategy used in
  * ../Modules/getpath.c; it uses the Windows Registry as one of its
  * information sources.
+ *
+ * Py_SetPath() can be used to override this mechanism.  Call Py_SetPath
+ * with a semicolon separated path prior to calling Py_Initialize.
  */
 
 #ifndef LANDMARK
@@ -654,6 +657,22 @@
 
 /* External interface */
 
+void
+Py_SetPath(const wchar_t *path)
+{
+	if (module_search_path != NULL) {
+		free(module_search_path);
+		module_search_path = NULL;
+	}
+	if (path != NULL) {
+		get_progpath();
+		prefix[0] = L'\0';
+		module_search_path = malloc((wcslen(path) + 1) * sizeof(wchar_t));
+		if (module_search_path != NULL)
+			wcscpy(module_search_path, path);
+	}
+}
+
 wchar_t *
 Py_GetPath(void)
 {