diff --git a/emxbeta/EMXBeta.iss b/emxbeta/EMXBeta.iss
new file mode 100644
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--- /dev/null
+++ b/emxbeta/EMXBeta.iss
@@ -0,0 +1,120 @@
+; ============================================================================
+; EMX Beta Environment Variable Installer
+; Sets system environment variable EMX_BETA=TRUE
+; ============================================================================
+;
+; This installer:
+; - Sets system environment variable EMX_BETA=TRUE
+; - Registers in Add/Remove Programs for easy uninstall
+; - Uninstall removes the EMX_BETA environment variable
+;
+; Silent Installation:
+;   EMXBetaSetup_v1.0.exe /VERYSILENT /SUPPRESSMSGBOXES
+;
+; ============================================================================
+
+[Setup]
+AppId={{F7A2C8E1-3B4D-4F6A-9E2C-1D8B5A7F3E09}}
+AppName=GE Aerospace eMx BETA Configuration
+AppVersion=1.0
+AppPublisher=GE Aerospace
+DefaultDirName={autopf}\EMXBeta
+CreateAppDir=no
+PrivilegesRequired=admin
+OutputDir=Output
+OutputBaseFilename=EMXBetaSetup_v1.0
+SolidCompression=yes
+Compression=lzma2
+WizardStyle=modern
+SetupIconFile=gea-logo.ico
+WizardImageFile=banner.bmp
+WizardSmallImageFile=banner-sm.bmp
+DisableWelcomePage=no
+DisableDirPage=yes
+DisableProgramGroupPage=yes
+DisableReadyPage=no
+DisableFinishedPage=no
+Uninstallable=yes
+CreateUninstallRegKey=yes
+
+[Languages]
+Name: "english"; MessagesFile: "compiler:Default.isl"
+
+[Messages]
+WelcomeLabel2=This will configure the EMX_BETA system environment variable on your computer.%n%nThis sets:%n%n    EMX_BETA = TRUE%n%nClick Next to continue.
+
+[Registry]
+; Set system environment variable EMX_BETA=TRUE
+Root: HKLM; Subkey: "SYSTEM\CurrentControlSet\Control\Session Manager\Environment"; ValueType: string; ValueName: "EMX_BETA"; ValueData: "TRUE"; Flags: uninsdeletevalue
+
+[Code]
+const
+  APP_NAME = 'EMX Beta Configuration';
+
+function InitializeSetup: Boolean;
+begin
+  Result := True;
+
+  if not IsAdmin then
+  begin
+    MsgBox('This installer requires administrator privileges.' + #13#10 +
+           'Please right-click and select "Run as administrator".',
+           mbError, MB_OK);
+    Result := False;
+  end;
+end;
+
+// Broadcast WM_SETTINGCHANGE so running processes pick up the new variable
+procedure BroadcastEnvironmentChange;
+var
+  ResultCode: Integer;
+begin
+  Exec('cmd.exe', '/c setx EMX_BETA_NOTIFY 1 >nul 2>&1 & reg delete "HKCU\Environment" /v EMX_BETA_NOTIFY /f >nul 2>&1',
+       '', SW_HIDE, ewWaitUntilTerminated, ResultCode);
+end;
+
+procedure CurStepChanged(CurStep: TSetupStep);
+begin
+  if CurStep = ssPostInstall then
+  begin
+    // Broadcast environment change to notify running applications
+    BroadcastEnvironmentChange;
+
+    if not WizardSilent then
+      MsgBox('EMX_BETA environment variable has been set to TRUE.' + #13#10 + #13#10 +
+             'You may need to restart applications or log off/on for the change to take effect.',
+             mbInformation, MB_OK);
+  end;
+end;
+
+procedure CurUninstallStepChanged(CurUninstallStep: TUninstallStep);
+var
+  ResultCode: Integer;
+begin
+  if CurUninstallStep = usPostUninstall then
+  begin
+    // Registry flag is auto-removed by Inno (uninsdeletevalue)
+    // Broadcast environment change to notify running applications
+    Exec('cmd.exe', '/c setx EMX_BETA_NOTIFY 1 >nul 2>&1 & reg delete "HKCU\Environment" /v EMX_BETA_NOTIFY /f >nul 2>&1',
+         '', SW_HIDE, ewWaitUntilTerminated, ResultCode);
+
+    if not UninstallSilent then
+      MsgBox('EMX_BETA environment variable has been removed.' + #13#10 + #13#10 +
+             'You may need to restart applications or log off/on for the change to take effect.',
+             mbInformation, MB_OK);
+  end;
+end;
+
+function UpdateReadyMemo(Space, NewLine, MemoUserInfoInfo, MemoDirInfo, MemoTypeInfo,
+  MemoComponentsInfo, MemoGroupInfo, MemoTasksInfo: String): String;
+begin
+  Result := 'EMX Beta Configuration' + NewLine +
+            NewLine +
+            'The following system environment variable will be set:' + NewLine +
+            NewLine +
+            Space + 'Name:  EMX_BETA' + NewLine +
+            Space + 'Value: TRUE' + NewLine +
+            NewLine +
+            'This variable will be available system-wide after installation.' + NewLine +
+            'A restart of applications or logoff/logon may be required.';
+end;
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