diff --git a/main/install/images/LrgImage.bmp b/main/install/images/LrgImage.bmp
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Binary files /dev/null and b/main/install/images/LrgImage.bmp differ
diff --git a/main/install/images/SmlImage.bmp b/main/install/images/SmlImage.bmp
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index 00000000..c1f09921
Binary files /dev/null and b/main/install/images/SmlImage.bmp differ
diff --git a/main/install/steam installer.iss b/main/install/steam installer.iss
new file mode 100644
index 00000000..72f14539
--- /dev/null
+++ b/main/install/steam installer.iss	
@@ -0,0 +1,83 @@
+; Script generated by the Inno Setup Script Wizard.
+; SEE THE DOCUMENTATION FOR DETAILS ON CREATING INNO SETUP SCRIPT FILES!
+
+[Setup]
+AppName=Natural Selection
+AppVerName=Natural Selection 3.1
+AppPublisher=Unknown Worlds Entertainment
+AppPublisherURL=http://www.unknownworlds.com
+AppSupportURL=http://www.unknownworlds.com/ns/view?action=manual
+AppUpdatesURL=http://www.unknownworlds.com/ns/view?action=files
+DefaultDirName={code:MyDir}
+DisableDirPage=no
+DefaultGroupName=Natural Selection
+DisableProgramGroupPage=yes
+WizardImageFile=v:\install\images\LrgImage.bmp
+WizardSmallImageFile=v:\install\images\SmlImage.bmp
+
+[Files]
+;Source: "v:\install\config\config.cfg"; DestDir: {app}\nsp\; Flags: confirmoverwrite
+;Source: "v:\install\ns\*.*"; DestDir: "{app}\nsp"; Flags: ignoreversion recursesubdirs
+Source: "v:\install\ns-diff\*.*"; DestDir: "{app}\nsp"; Flags: ignoreversion recursesubdirs
+;Source: "E:\ns21install\fmod.dll"; DestDir: "{app}"; Flags: ignoreversion
+
+[Run]
+;Filename: "{app}\nsp\xfire_installer.exe"; Description: "Xfire is the Instant Messenger for gamers.  See when, where, and what games (Natural Selection and over 75 others) your friends are playing and join them with one click.  It's free.  Install now?"; Flags: postinstall
+
+[Code]
+function GetSteamDir(): String;
+var
+   sPrevPath: String;
+begin
+  sPrevPath := '';
+  RegQueryStringValue( HKCU, 'Software\Valve\Steam','ModInstallPath', sPrevpath);
+  Result := sPrevPath;
+end;
+
+function GetWonDir(): String;
+var
+   sPrevPath: String;
+begin
+  sPrevPath := '';
+  RegQueryStringValue( HKCU, 'Software\Valve\Half-Life','InstallPath', sPrevpath);
+  Result := sPrevPath;
+end;
+
+function MyDir(Default: String): String;
+var
+    sPath : String;
+begin
+  sPath := GetSteamDir();
+  if (Length(sPath) < 1) then
+  begin
+    sPath := GetWonDir();
+  end;
+  Result := sPath;
+end;
+
+function InitializeSetup(): Boolean;
+var
+    sSteamPath: String;
+    sWonPath: String;
+    bResult: Boolean;
+    mbResult: Integer;
+begin
+  bResult:=true;
+  // if ( CheckForMutexes('__SteamBootstrapperApp__')) then
+  //begin
+  //  MsgBox( 'STEAM is currently running, please stop STEAM before running this setup.' , mbInformation, MB_OK );
+  //  bResult := false;
+  //end;
+  sSteamPath := GetSteamDir();
+  sWonPath := GetWonDir();
+  if ((Length(sSteamPath) < 1) and (Length(sWonPath) < 1) and bResult) then
+  begin
+      mbResult := MsgBox( 'Setup has not detected a valid Steam or Half-Life (WON) install. Do you wish to continue?.' , mbConfirmation, MB_YESNO);
+      if (mbResult = idNo) then
+      begin
+        bResult := false;
+      end;
+  end;
+  Result := bResult;
+end;
+