diff --git a/Examples/cvsdata.nsi b/Examples/cvsdata.nsi
index 26415519..f4774a9a 100644
--- a/Examples/cvsdata.nsi
+++ b/Examples/cvsdata.nsi
@@ -42,10 +42,13 @@ Function .onInit
 
   StrCpy ${NSISPATH} "$EXEDIR\.."
   
-  IfFileExists "${NSISPATH}\CVS\Root" "" +3
-    MessageBox MB_YESNO|MB_ICONEXCLAMATION \
-    "Your NSIS folder already contains CVS data. Do you want to overwrite your current data?" IDYES +2
-    Quit
+  IfFileExists "${NSISPATH}\CVS\Root" "" +6
+    Call GetParameters
+    Pop $R0
+    StrCmp $R0 "nooverwrite" +2
+      MessageBox MB_YESNO|MB_ICONEXCLAMATION \
+      "Your NSIS folder already contains CVS data. Do you want to overwrite your current data?" IDYES +2
+      Quit
 
 FunctionEnd
 
@@ -67,7 +70,6 @@ Section ""
 !insertmacro CVSDATA "Contrib\LangDLL"
 !insertmacro CVSDATA "Contrib\Language files"
 !insertmacro CVSDATA "Contrib\Makensisw"
-!insertmacro CVSDATA "Contrib\Makensisw\jnetlib"
 !insertmacro CVSDATA "Contrib\Modern UI"
 !insertmacro CVSDATA "Contrib\Modern UI\Language files"
 !insertmacro CVSDATA "Contrib\NSIS Update"
@@ -102,4 +104,36 @@ Section ""
 
 SectionEnd
 
-!verbose 4
\ No newline at end of file
+!verbose 4
+
+;--------------------------------
+;Function
+
+Function GetParameters
+
+  Push $R0
+  Push $R1
+  Push $R2
+  
+  StrCpy $R0 $CMDLINE 1
+  StrCpy $R1 '"'
+  StrCpy $R2 1
+  StrCmp $R0 '"' loop
+    StrCpy $R1 ' ' ; we're scanning for a space instead of a quote
+  loop:
+    StrCpy $R0 $CMDLINE 1 $R2
+    StrCmp $R0 $R1 loop2
+    StrCmp $R0 "" loop2
+    IntOp $R2 $R2 + 1
+    Goto loop
+  loop2:
+    IntOp $R2 $R2 + 1
+    StrCpy $R0 $CMDLINE 1 $R2
+    StrCmp $R0 " " loop2
+  StrCpy $R0 $CMDLINE "" $R2
+  
+  Pop $R2
+  Pop $R1
+  Exch $R0
+  
+FunctionEnd
\ No newline at end of file
diff --git a/Examples/makensis.nsi b/Examples/makensis.nsi
index 558269c2..3be322a2 100644
--- a/Examples/makensis.nsi
+++ b/Examples/makensis.nsi
@@ -6,7 +6,8 @@
 ;--------------------------------
 ;Compile CVS Data Setup
 
-!system '"${NSISDIR}\makensis.exe" cvsdata.nsi'
+!system '"${NSISDIR}\Bin\InstallCVSData.exe" nooverwrite'
+!system '"${NSISDIR}\makensis.exe" cvsdata.nsi' = 0
 
 ;--------------------------------
 ;Configuration