diff --git a/src/main/java/net/minecraft/launchwrapper/Launch.java b/src/main/java/net/minecraft/launchwrapper/Launch.java
index bb3766f..f60317e 100644
--- a/src/main/java/net/minecraft/launchwrapper/Launch.java
+++ b/src/main/java/net/minecraft/launchwrapper/Launch.java
@@ -7,13 +7,20 @@ import joptsimple.OptionSpec;
 import java.io.File;
 import java.lang.reflect.Method;
 import java.net.URLClassLoader;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Map;
 import java.util.logging.Level;
 
 public class Launch {
     private static final String DEFAULT_TWEAK = "net.minecraft.launchwrapper.VanillaTweaker";
     public static File minecraftHome;
     public static File assetsDir;
-
+    public static Map<String,Object> blackboard;
+    
     public static void main(String[] args) {
         new Launch().launch(args);
     }
@@ -23,6 +30,7 @@ public class Launch {
     private Launch() {
         final URLClassLoader ucl = (URLClassLoader) getClass().getClassLoader();
         classLoader = new LaunchClassLoader(ucl.getURLs());
+        blackboard = new HashMap<String,Object>();
     }
 
     private void launch(String[] args) {
@@ -32,29 +40,60 @@ public class Launch {
         final OptionSpec<String> profileOption = parser.accepts("version", "The version we launched with").withRequiredArg();
         final OptionSpec<File> gameDirOption = parser.accepts("gameDir", "Alternative game directory").withRequiredArg().ofType(File.class);
         final OptionSpec<File> assetsDirOption = parser.accepts("assetsDir", "Assets directory").withRequiredArg().ofType(File.class);
-        final OptionSpec<String> tweakClassOption = parser.accepts("tweakClass", "Tweak class to load").withRequiredArg().defaultsTo(DEFAULT_TWEAK);
+        final OptionSpec<String> tweakClassOption = parser.accepts("tweakClass", "Tweak class(es) to load").withRequiredArg().defaultsTo(DEFAULT_TWEAK);
         final OptionSpec<String> nonOption = parser.nonOptions();
 
         final OptionSet options = parser.parse(args);
         minecraftHome = options.valueOf(gameDirOption);
         assetsDir = options.valueOf(assetsDirOption);
         final String profileName = options.valueOf(profileOption);
-        final String tweakClassName = options.valueOf(tweakClassOption);
+        final List<String> tweakClassNames = new ArrayList<String>(options.valuesOf(tweakClassOption));
 
+        final List<String> argumentList = new ArrayList<String>();
+        
+        blackboard.put("TweakClasses", tweakClassNames);
+        blackboard.put("ArgumentList", argumentList);
+
+        final List<ITweaker> allTweakers = new ArrayList<ITweaker>();
         try {
-            LogWrapper.log(Level.INFO, "Using tweak class name %s", tweakClassName);
+            final List<ITweaker> tweakers = new ArrayList(tweakClassNames.size() + 1);
+            blackboard.put("Tweaks", tweakers);
+            ITweaker primaryTweaker = null;
+            do {
+                for (final Iterator<String> it = tweakClassNames.iterator(); it.hasNext(); ) {
+                    final String tweakName = it.next();
+                    LogWrapper.log(Level.INFO, "Loading tweak class name %s", tweakName);
+        
+                    // Ensure we allow the tweak class to load with the parent classloader
+                    classLoader.addClassLoaderExclusion(tweakName.substring(0,tweakName.lastIndexOf('.')));
+                    final ITweaker tweaker = (ITweaker) Class.forName(tweakName, true, classLoader).newInstance();
+                    tweakers.add(tweaker);
+                    it.remove();
+                    if (primaryTweaker == null) {
+                        LogWrapper.log(Level.INFO, "Using primary tweak class name %s", tweakName);
+                        primaryTweaker = tweaker;
+                    }
+                }
+                for (final Iterator<ITweaker> it = tweakers.iterator(); it.hasNext(); ) {
+                    final ITweaker tweaker = it.next();
+                    LogWrapper.log(Level.INFO, "Calling tweak class %s", tweaker.getClass().getName());
+                    tweaker.acceptOptions(options.valuesOf(nonOption), minecraftHome, assetsDir, profileName);
+                    tweaker.injectIntoClassLoader(classLoader);
+                    allTweakers.add(tweaker);
+                    it.remove();
+                }
+            } while (!tweakClassNames.isEmpty());
 
-            // Ensure we allow the tweak class to load with the parent classloader
-            classLoader.addClassLoaderExclusion(tweakClassName.substring(0,tweakClassName.lastIndexOf('.')));
-            final ITweaker tweaker = (ITweaker) Class.forName(tweakClassName, true, classLoader).newInstance();
-            tweaker.acceptOptions(options.valuesOf(nonOption), minecraftHome, assetsDir, profileName);
-            tweaker.injectIntoClassLoader(classLoader);
-
-            final Class<?> clazz = Class.forName(tweaker.getLaunchTarget(), false, classLoader);
+            for (final ITweaker tweaker : allTweakers) {
+                argumentList.addAll(Arrays.asList(tweaker.getLaunchArguments()));
+            }
+            
+            final String launchTarget = primaryTweaker.getLaunchTarget();
+            final Class<?> clazz = Class.forName(launchTarget, false, classLoader);
             final Method mainMethod = clazz.getMethod("main", new Class[]{String[].class});
 
-            LogWrapper.info("Launching wrapped minecraft");
-            mainMethod.invoke(null, (Object) tweaker.getLaunchArguments());
+            LogWrapper.info("Launching wrapped minecraft {%s}", launchTarget);
+            mainMethod.invoke(null, (Object) argumentList.toArray(new String[argumentList.size()]));
         } catch (Exception e) {
             LogWrapper.log(Level.SEVERE, e, "Unable to launch");
         }