diff --git a/mozilla/xpinstall/src/ScheduledTasks.cpp b/mozilla/xpinstall/src/ScheduledTasks.cpp
new file mode 100644
index 00000000000..ff6bd598781
--- /dev/null
+++ b/mozilla/xpinstall/src/ScheduledTasks.cpp
@@ -0,0 +1,166 @@
+/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/*
+ * The contents of this file are subject to the Netscape Public License
+ * Version 1.0 (the "License"); you may not use this file except in
+ * compliance with the License.  You may obtain a copy of the License at
+ * http://www.mozilla.org/NPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla Communicator client code, 
+ * released March 31, 1998. 
+ *
+ * The Initial Developer of the Original Code is Netscape Communications 
+ * Corporation.  Portions created by Netscape are 
+ * Copyright (C) 1998 Netscape Communications Corporation.  All Rights
+ * Reserved.
+ *
+ * Contributors:
+ *     Daniel Veditz <dveditz@netscape.com>
+ *     Douglas Turner <dougt@netscape.com>
+ */
+
+#include "nscore.h"
+#include "NSReg.h"
+#include "nsFileSpec.h"
+
+
+
+
+REGERR DeleteFileLater(const char * filename)
+{
+    RKEY newkey;
+    REGERR result = -1;
+    HREG reg;
+    if ( REGERR_OK == NR_RegOpen("", &reg) ) 
+    {
+        if (REGERR_OK == NR_RegAddKey( reg, ROOTKEY_PRIVATE, REG_DELETE_LIST_KEY, &newkey) )
+        {
+            result = NR_RegSetEntryString( reg, newkey, (char*)filename, "" );
+        }
+
+        NR_RegClose(reg);
+    }
+
+    return result;
+}
+
+REGERR ReplaceFileLater(const char *tmpfile, const char *target )
+{
+    RKEY newkey;
+    REGERR err;
+    HREG reg;
+
+    if ( REGERR_OK == NR_RegOpen("", &reg) ) 
+    {
+        err = NR_RegAddKey( reg, ROOTKEY_PRIVATE, REG_REPLACE_LIST_KEY, &newkey);
+        if ( err == REGERR_OK ) 
+        {
+            err = NR_RegSetEntryString( reg, newkey, (char*)tmpfile, (char*)target );
+        }
+        NR_RegClose(reg);
+    }
+    return err;
+}
+
+void DeleteScheduledFiles(void)
+{
+    HREG reg;
+
+    if (REGERR_OK == NR_RegOpen("", &reg))
+    {
+        RKEY    key;
+	    REGENUM state;
+
+        /* perform scheduled file deletions and replacements (PC only) */
+        if (REGERR_OK ==  NR_RegGetKey(reg, ROOTKEY_PRIVATE, REG_DELETE_LIST_KEY,&key))
+        {
+            char buf[MAXREGNAMELEN];
+
+            while (REGERR_OK == NR_RegEnumEntries(reg, key, &state, buf, sizeof(buf), NULL ))
+            {
+                nsFileSpec doomedFile(buf);
+
+                doomedFile.Delete(PR_FALSE);
+                
+                if (! doomedFile.Exists()) 
+                {
+                    NR_RegDeleteEntry( reg, key, buf );
+                }
+            }
+
+            /* delete list node if empty */
+			if (REGERR_NOMORE == NR_RegEnumEntries( reg, key, &state, buf, sizeof(buf), NULL ))
+            {
+                NR_RegDeleteKey(reg, ROOTKEY_PRIVATE, REG_DELETE_LIST_KEY);
+            }
+        }
+        
+        NR_RegClose(reg);
+    }
+}
+
+void ReplaceScheduledFiles(void)
+{
+    HREG reg;
+     
+    if (REGERR_OK == NR_RegOpen("", &reg))
+    {
+        RKEY    key;
+	    REGENUM state;
+
+        /* replace files if any listed */
+        if (REGERR_OK ==  NR_RegGetKey(reg, ROOTKEY_PRIVATE, REG_REPLACE_LIST_KEY, &key))
+        {
+            char tmpfile[MAXREGNAMELEN];
+            char target[MAXREGNAMELEN];
+
+            state = 0;
+            while (REGERR_OK == NR_RegEnumEntries(reg, key, &state, tmpfile, sizeof(tmpfile), NULL ))
+            {
+                nsFileSpec replaceFile(tmpfile);
+
+                if (! replaceFile.Exists() )
+                {
+                    NR_RegDeleteEntry( reg, key, tmpfile );
+                }
+                else if ( REGERR_OK != NR_RegGetEntryString( reg, key, tmpfile, target, sizeof(target) ) )
+                {
+                    /* can't read target filename, corruption? */
+                    NR_RegDeleteEntry( reg, key, tmpfile );
+                }
+                else 
+                {
+                    nsFileSpec targetFile(target);
+                    targetFile.Delete(PR_FALSE);
+                
+                    if (!targetFile.Exists())
+                    {
+                        nsFileSpec parentofTarget;
+                        targetFile.GetParent(parentofTarget);                                           
+                    
+                        nsresult result = replaceFile.Move(parentofTarget);
+                        if ( NS_SUCCEEDED(result) )
+                        {
+                            char* leafName = targetFile.GetLeafName();
+                            replaceFile.Rename(leafName);
+                            delete [] leafName;
+                            
+                            NR_RegDeleteEntry( reg, key, tmpfile );
+                        }
+                    }
+                }
+            }
+            /* delete list node if empty */
+            if (REGERR_NOMORE == NR_RegEnumEntries(reg, key, &state, tmpfile, sizeof(tmpfile), NULL )) 
+            {
+                NR_RegDeleteKey(reg, ROOTKEY_PRIVATE, REG_REPLACE_LIST_KEY);
+            }
+        }
+        
+        NR_RegClose(reg);
+    }
+}
diff --git a/mozilla/xpinstall/src/ScheduledTasks.h b/mozilla/xpinstall/src/ScheduledTasks.h
new file mode 100644
index 00000000000..ede56de2050
--- /dev/null
+++ b/mozilla/xpinstall/src/ScheduledTasks.h
@@ -0,0 +1,40 @@
+/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/*
+ * The contents of this file are subject to the Netscape Public License
+ * Version 1.0 (the "License"); you may not use this file except in
+ * compliance with the License.  You may obtain a copy of the License at
+ * http://www.mozilla.org/NPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is Mozilla Communicator client code, 
+ * released March 31, 1998. 
+ *
+ * The Initial Developer of the Original Code is Netscape Communications 
+ * Corporation.  Portions created by Netscape are 
+ * Copyright (C) 1998 Netscape Communications Corporation.  All Rights
+ * Reserved.
+ *
+ * Contributors:
+ *     Daniel Veditz <dveditz@netscape.com>
+ *     Douglas Turner <dougt@netscape.com>
+ */
+
+
+#ifndef __SCHEDULEDTASKS_H__
+#define __SCHEDULEDTASKS_H__
+
+
+#include "NSReg.h"
+
+REGERR DeleteFileLater(const char * filename);
+REGERR ReplaceFileLater(const char *tmpfile, const char *target );
+
+void DeleteScheduledFiles(void);
+void ReplaceScheduledFiles(void);
+
+
+#endif
\ No newline at end of file