diff --git a/gui/dialogs/mp-display.xml b/gui/dialogs/mp-display.xml
deleted file mode 100644
index 903b36772..000000000
--- a/gui/dialogs/mp-display.xml
+++ /dev/null
@@ -1,250 +0,0 @@
-<?xml version="1.0"?>
-
-<PropertyList>
-
-  <name>mp-display</name>
-  <modal>false</modal>
-  <layout>vbox</layout>
-
-  <nasal>
-   <open>
-    var dlg_root = cmdarg();
-
-    var update = func() {
-        print("Updating");
-        #fgcommand("dialog-update", dlg_root);
-        fgcommand("dialog-new", dlg_root);
-		#fgcommand("dialog-show", dlg_root);
-    }
-
-    var findElementByName = func(rootN, name) {
-        foreach( var child; rootN.getChildren() ) {
-            var n = child.getNode( "name" );
-            if( n != nil and n.getValue() == name )
-            return child;
-            var f = findElementByName(child,name);
-            if( f != nil ) return f;
-        }
-        return nil;
-    };
-
-    var resetDialog = func(root) {
-
-        print("resetDialog called " ~ root.getPath());
-
-        var classes = props.globals.getNode("/sim/multiplay/display").getChildren("usage-class");
-        var combo = findElementByName( root, "usage-class-selection" );
-        forindex (var i; classes) {
-              combo.getChild("value", i, 1).setValue(classes[i].getNode("name").getValue());
-        }
-
-        var display = findElementByName( root, "usage-class-display" );
-        forindex (var i; classes) {
-
-            # We don't allow users to display the "Ignore" class.
-            if (classes[i].getNode("name").getValue() != "Ignore") {
-                var check = display.getChild("checkbox", i, 1);
-                check.getNode("row", 1).setValue(i + 1);
-                check.getNode("col", 1).setValue(1);
-                check.getNode("property", 1).setValue(classes[i].getNode("visible").getPath());
-                #check.getNode("value", 1).setValue(classes[i].
-                #check.getNode("live", 1).setValue(1);
-
-                var text = display.getChild("text", i, 1);
-                text.getNode("row", 1).setValue(i + 1);
-                text.getNode("col", 1).setValue(2);
-                text.getNode("halign", 1).setValue("left");
-                text.getNode("label", 1).setValue(classes[i].getNode("name").getValue());
-            }
-        }
-    }
-
-    resetDialog(dlg_root);
-   </open>
-  </nasal>
-
-  <group>
-    <layout>hbox</layout>
-    <text>
-      <label>Multiplayer Display Options</label>
-    </text>
-  </group>
-
-  <group>
-    <layout>hbox</layout>
-    <hrule/>
-  </group>
-
-  <group>
-    <layout>hbox</layout>
-    <halign>left</halign>
-    <text>
-      <label>Current MP group:</label>
-    </text>
-
-    <combo>
-      <name>usage-class-selection</name>
-      <halign>fill</halign>
-      <stretch>true</stretch>
-      <property>sim/multiplay/usage-class</property>
-      <binding>
-        <command>dialog-apply</command>
-        <object-name>usage-class-selection</object-name>
-      </binding>
-      <binding>
-        <command>nasal</command>
-        <script>setprop("/sim/multiplay/usage-class-hash", string.hash(getprop("/sim/multiplay/usage-class")));</script>
-      </binding>
-    </combo>
-  </group>
-
-  <group>
-    <layout>hbox</layout>
-    <hrule/>
-  </group>
-
-  <group>
-    <layout>hbox</layout>
-    <halign>left</halign>
-    <text>
-      <label>Displayed MP Groups:</label>
-    </text>
-  </group>
-
-  <group>
-    <layout>table</layout>
-    <halign>center</halign>
-    <name>usage-class-display</name>
-    <valign>top</valign>
-  </group>
-
-  <group>
-    <layout>hbox</layout>
-    <halign>left</halign>
-    <text>
-      <label>Add MP Group:</label>
-    </text>
-
-    <input>
-      <name>add</name>
-      <stretch>true</stretch>
-      <halign>fill</halign>
-      <stretch>true</stretch>
-      <length>20</length>
-      <property>/sim/multiplay/new-usage-class</property>
-    </input>
-    <button>
-      <legend>Add</legend>
-      <default>true</default>
-      <equal>true</equal>
-      <binding>
-        <command>dialog-apply</command>
-      </binding>
-      <binding>
-        <command>nasal</command>
-        <script>
-          var new_name = getprop("/sim/multiplay/new-usage-class");
-          var classes = props.globals.getNode("/sim/multiplay/display").getChildren("usage-class");
-
-          # Check if this is a duplicate hash.
-          var new_hash = string.hash(getprop("/sim/multiplay/new-usage-class"));
-          var clash = 0;
-
-          forindex (var i; classes) {
-            if (new_hash == string.hash(classes[i].getNode("name", 1).getValue())) {
-                # This is a duplicate hash. Set an error message
-                clash = 1;
-                var error = findElementByName( dlg_root, "errormsg" );
-                error.getNode("label", 1).setValue("Error: Cannot create duplicate MP Group hash");
-            }
-          }
-
-          if (clash == 0) {
-
-            var newclass = props.globals.getNode("/sim/multiplay/display/usage-class[" ~ size(classes) ~ "]", 1);
-            newclass.getNode("name",1).setValue(new_name);
-            newclass.getNode("hash",1).setValue(new_hash);
-
-            # Assume user wants this new class to be visible
-            newclass.getNode("visible",1).setValue(1);
-
-            # Reset the dialog to pick up the changes.
-            resetDialog();
-          }
-
-          update();
-
-
-        </script>
-      </binding>
-         <binding>
-     <command>dialog-show</command>
-     <dialog-name>mp-display</dialog-name>
-    </binding>
-    <binding>
-      <command>dialog-close</command>
-    </binding>
-    </button>
-  </group>
-
-
-  <group>
-    <layout>hbox</layout>
-    <halign>left</halign>
-    <text>
-      <name>errormsg</name>
-      <label/>
-    </text>
-  </group>
-
-  <group>
-    <layout>hbox</layout>
-
-    <button>
-      <legend>OK</legend>
-      <default>true</default>
-      <equal>true</equal>
-      <binding>
-        <command>dialog-apply</command>
-      </binding>
-      <binding>
-        <command>nasal</command>
-        <script>multiplayer.resetVisibility();</script>
-      </binding>
-      <binding>
-        <command>dialog-close</command>
-      </binding>
-    </button>
-
-    <button>
-      <legend>Apply</legend>
-      <equal>true</equal>
-      <binding>
-        <command>dialog-apply</command>
-      </binding>
-      <binding>
-        <command>nasal</command>
-        <script>multiplayer.resetVisibility();</script>
-      </binding>
-    </button>
-
-    <button>
-      <legend>Reset</legend>
-      <equal>true</equal>
-      <binding>
-        <command>dialog-update</command>
-      </binding>
-    </button>
-
-    <button>
-      <legend>Cancel</legend>
-      <equal>true</equal>
-      <key>Esc</key>
-      <binding>
-        <command>dialog-close</command>
-      </binding>
-    </button>
-
-  </group>
-
-</PropertyList>