diff --git a/ReadMe.txt b/ReadMe.txt
new file mode 100644
index 0000000..5da34e4
--- /dev/null
+++ b/ReadMe.txt
@@ -0,0 +1,4 @@
+The ClassicShellSetup.exe installer supports many command line parameters:
+    <no command line> - runs the installer normally
+    extract32 - extracts the 32-bit MSI
+    extract64 - extracts the 64-bit MSI
diff --git a/builder-product.cfg b/builder-product.cfg
index 33b422a..ab071c3 100644
--- a/builder-product.cfg
+++ b/builder-product.cfg
@@ -27,11 +27,11 @@ ICON_DL_INDEX=0
 
 OPSI_INI_SECTION[0]="X86"
 OPSI_INI_OPTION[0]="MsiId32"
-OPSI_INI_VALUE[0]="{D29400E8-A6AB-4AD0-A060-9627EFB283AD}"
+OPSI_INI_VALUE[0]="{CB81456D-7E4B-4F06-A216-BA7B4ABD9316}"
 
 OPSI_INI_SECTION[1]="X86_64"
 OPSI_INI_OPTION[1]="MsiId64"
-OPSI_INI_VALUE[1]="{7F34ADBE-77C0-47A0-BBC6-B3DA16CE8E68}"
+OPSI_INI_VALUE[1]="{FD722BB1-4960-455F-89C6-EFAEB79527EF}"
 
 WINST_NAME[0]="RealUninstallProgramm32"
 WINST_VALUE[0]="@DL_EXTRACT_WINST_PATH[1]@\\classicshell-uninstall.exe"