diff --git a/fml/common/cpw/mods/fml/common/launcher/FMLServerTweaker.java b/fml/common/cpw/mods/fml/common/launcher/FMLServerTweaker.java
index 1f38e9204a..95b954f6d2 100644
--- a/fml/common/cpw/mods/fml/common/launcher/FMLServerTweaker.java
+++ b/fml/common/cpw/mods/fml/common/launcher/FMLServerTweaker.java
@@ -13,10 +13,12 @@ public class FMLServerTweaker extends FMLTweaker {
     @Override
     public void injectIntoClassLoader(LaunchClassLoader classLoader)
     {
+        computeCascadedTweaks(classLoader);
         classLoader.addTransformerExclusion("cpw.mods.fml.repackage.");
         classLoader.addTransformerExclusion("cpw.mods.fml.relauncher.");
         classLoader.addTransformerExclusion("cpw.mods.fml.common.asm.transformers.");
         classLoader.addClassLoaderExclusion("LZMA.");
         FMLLaunchHandler.configureForServerLaunch(classLoader, this);
+        runAdditionalTweaks(classLoader);
     }
 }
diff --git a/fml/common/cpw/mods/fml/common/launcher/FMLTweaker.java b/fml/common/cpw/mods/fml/common/launcher/FMLTweaker.java
index e471de593c..f478ee27ce 100644
--- a/fml/common/cpw/mods/fml/common/launcher/FMLTweaker.java
+++ b/fml/common/cpw/mods/fml/common/launcher/FMLTweaker.java
@@ -7,7 +7,14 @@ import java.util.List;
 import java.util.logging.Level;
 import java.util.logging.Logger;
 
+import joptsimple.ArgumentAcceptingOptionSpec;
+import joptsimple.NonOptionArgumentSpec;
+import joptsimple.OptionParser;
+import joptsimple.OptionSet;
+
+import com.google.common.base.Joiner;
 import com.google.common.base.Throwables;
+import com.google.common.collect.Lists;
 import com.google.common.collect.ObjectArrays;
 
 import cpw.mods.fml.relauncher.FMLLaunchHandler;
@@ -22,11 +29,14 @@ public class FMLTweaker implements ITweaker {
     private String profile;
     private static URI jarLocation;
     private String[] array;
+    private List<ITweaker> cascadedTweaks;
+    private String profileName;
+    private OptionSet parsedOptions;
+    private ArgumentAcceptingOptionSpec<String> cascadedTweaksOption;
 
     @Override
     public void acceptOptions(List<String> args, File gameDir, File assetsDir, String profile)
     {
-        this.args = args;
         this.gameDir = (gameDir == null ? new File(".") : gameDir);
         this.assetsDir = assetsDir;
         this.profile = profile;
@@ -39,16 +49,64 @@ public class FMLTweaker implements ITweaker {
             Logger.getLogger("FMLTWEAK").log(Level.SEVERE, "Missing URI information for FML tweak");
             throw Throwables.propagate(e);
         }
+
+        OptionParser optionParser = new OptionParser();
+        cascadedTweaksOption = optionParser.accepts("cascadedTweaks", "Additional tweaks to be called by FML, implementing ITweaker").withRequiredArg().ofType(String.class).withValuesSeparatedBy(',');
+        ArgumentAcceptingOptionSpec<String> profileNameOption = optionParser.accepts("profileName", "A profile name, parsed by FML to control mod loading and such").withRequiredArg().ofType(String.class);
+        optionParser.allowsUnrecognizedOptions();
+        NonOptionArgumentSpec<String> nonOptions = optionParser.nonOptions();
+
+        parsedOptions = optionParser.parse(args.toArray(new String[args.size()]));
+        if (parsedOptions.has(profileNameOption))
+        {
+            profileName = profileNameOption.value(parsedOptions);
+        }
+        this.args = parsedOptions.valuesOf(nonOptions);
+        this.cascadedTweaks = Lists.newArrayList();
     }
 
     @Override
     public void injectIntoClassLoader(LaunchClassLoader classLoader)
     {
+        computeCascadedTweaks(classLoader);
         classLoader.addTransformerExclusion("cpw.mods.fml.repackage.");
         classLoader.addTransformerExclusion("cpw.mods.fml.relauncher.");
         classLoader.addTransformerExclusion("cpw.mods.fml.common.asm.transformers.");
         classLoader.addClassLoaderExclusion("LZMA.");
         FMLLaunchHandler.configureForClientLaunch(classLoader, this);
+        runAdditionalTweaks(classLoader);
+    }
+
+    void computeCascadedTweaks(LaunchClassLoader classLoader)
+    {
+        if (parsedOptions.has(cascadedTweaksOption))
+        {
+            for (String tweaker : cascadedTweaksOption.values(parsedOptions))
+            {
+                try
+                {
+                    classLoader.addClassLoaderExclusion(tweaker.substring(0,tweaker.lastIndexOf('.')));
+                    Class<? extends ITweaker> tweakClass = (Class<? extends ITweaker>) Class.forName(tweaker,true,classLoader);
+                    ITweaker additionalTweak = tweakClass.newInstance();
+                    cascadedTweaks.add(additionalTweak);
+                }
+                catch (Exception e)
+                {
+                    Logger.getLogger("FMLTWEAK").log(Level.INFO, "Missing additional tweak class "+tweaker);
+                }
+            }
+        }
+    }
+
+    void runAdditionalTweaks(LaunchClassLoader classLoader)
+    {
+        List<String> fmlArgs = Lists.newArrayList(args);
+        fmlArgs.add("--fmlIsPresent");
+        for (ITweaker tweak : cascadedTweaks)
+        {
+            tweak.acceptOptions(fmlArgs, gameDir, assetsDir, profile);
+            tweak.injectIntoClassLoader(classLoader);
+        }
     }
 
     @Override
@@ -83,6 +141,10 @@ public class FMLTweaker implements ITweaker {
             array = ObjectArrays.concat("UnknownFMLProfile",array);
             array = ObjectArrays.concat("--version",array);
         }
+        for (ITweaker tweak: cascadedTweaks)
+        {
+            array = ObjectArrays.concat(tweak.getLaunchArguments(), array, String.class);
+        }
         return array;
     }