can specify which level to load in xml editor.

Assets/Editor/XmlLevelEditor.cs

 using UnityEngine;
 using UnityEditor;
+using System;
 
 public class XmlLevelEditor : EditorWindow {
 
@@ -7,6 +8,8 @@ public class XmlLevelEditor : EditorWindow {
 	DeserializedLevelsSaver  		deserializedLevelsSaver;
 	DeserializedLevelsCrossChecker	deserializedLevelsCrossChecker;
 
+  private string levelToLoad = "0";
+
 	[MenuItem("Window/Xml Level Editor")]
 	public static void ShowWindow()
 	{
@@ -26,13 +29,28 @@ public class XmlLevelEditor : EditorWindow {
 		GUILayout.Label ("Import", EditorStyles.boldLabel);
 		GUILayout.Label ("Import Levels.xml into the scene");
 
+
+    GUILayout.Label("Level to load: ");
+    levelToLoad = GUILayout.TextField(levelToLoad);
 		if (GUILayout.Button("Import Levels.xml"))
     {
+      int levelIndex = 0;
+      try
+      {
+        levelIndex = System.Convert.ToInt32(levelToLoad);
+      }
+      catch (FormatException e){
+        Debug.LogWarning("Keine gltige Zahl eingegeben. Lade Level 0");
+      }
+      catch(OverflowException e2){
+        Debug.LogWarning("Keine gltige Zahl eingegeben. Lade Level 0");
+      }
       deserializedLevelsLoader.load();
-			deserializedLevelsLoader.loadLevel();
+			deserializedLevelsLoader.loadLevel(levelIndex);
     }
 
 
+
 		// Export section
 		GUILayout.Label ("Export", EditorStyles.boldLabel);
 		GUILayout.Label ("Export children of \"" + DeserializedLevelsSaver.xmlItemsToExportGOName +"\" GameObject into " + DeserializedLevelsSaver.xmlItemsToExportGOName +".xml", EditorStyles.wordWrappedLabel);