Force hardcoded references to the vanilla singleplayer menu to the new

mutator menu

Classes/UT2K4GUIControllerMutator.uc

@@ -1,5 +1,25 @@
 class UT2K4GUIControllerMutator extends UT2K4GUIController;
 
+function String SwapSPMenuClass(string NewMenuName)
+{
+    if ( NewMenuName ~= "GUI2K4.UT2K4SP_Main") //The vanilla single player menu
+    {
+        NewMenuName=Default.MainMenuOptions[0];
+    }
+
+    return NewMenuName;
+}
+
+event bool OpenMenu(string NewMenuName, optional string Param1, optional string Param2)
+{
+    return Super.OpenMenu(SwapSPMenuClass(NewMenuName), Param1, Param2);
+}
+
+event bool ReplaceMenu(string NewMenuName, optional string Param1, optional string Param2, optional bool bCancelled)
+{
+    return Super.ReplaceMenu(SwapSPMenuClass(NewMenuName),Param1,Param2,bCancelled);
+}
+
 defaultproperties
 {
     MainMenuOptions(0)="UT2k4SPMutators.UT2K4SPMutator_Main"