Server side tested and working. Setup is complex atm. That will change.

fml/common/cpw/mods/fml/relauncher/LaunchWrapper.java

@@ -0,0 +1,64 @@
+package cpw.mods.fml.relauncher;
+
+import java.io.File;
+import java.net.URLClassLoader;
+import java.util.logging.Level;
+
+import com.google.common.base.Throwables;
+
+public class LaunchWrapper {
+
+    /**
+     * @param args
+     */
+    public static void main(String[] args)
+    {
+        new LaunchWrapper().run(args);
+    }
+
+    private LaunchWrapper()
+    {
+
+    }
+
+    private void run(String[] args)
+    {
+        File minecraftHome = new File(".");
+        FMLRelaunchLog.minecraftHome = minecraftHome;
+        FMLRelauncher.logFileNamePattern = "ForgeModLoader-server-%g.log";
+        FMLRelauncher.side = "SERVER";
+        URLClassLoader ucl = (URLClassLoader) getClass().getClassLoader();
+
+        RelaunchClassLoader classLoader = new RelaunchClassLoader(ucl.getURLs());
+
+        RelaunchLibraryManager.downloadMonitor = new DummyDownloader();
+        Class<? super Object> server;
+        FMLInjectionData.build(minecraftHome, classLoader);
+        FMLRelaunchLog.info("Forge Mod Loader version %s.%s.%s.%s for Minecraft %s loading", FMLInjectionData.major, FMLInjectionData.minor,
+                FMLInjectionData.rev, FMLInjectionData.build, FMLInjectionData.mccversion, FMLInjectionData.mcpversion);
+        FMLRelaunchLog.info("Java is %s, version %s, running on %s:%s:%s, installed at %s", System.getProperty("java.vm.name"), System.getProperty("java.version"), System.getProperty("os.name"), System.getProperty("os.arch"), System.getProperty("os.version"), System.getProperty("java.home"));
+        FMLRelaunchLog.fine("Java classpath at launch is %s", System.getProperty("java.class.path"));
+        FMLRelaunchLog.fine("Java library path at launch is %s", System.getProperty("java.library.path"));
+
+        try
+        {
+            RelaunchLibraryManager.handleLaunch(minecraftHome, classLoader);
+        }
+        catch (Throwable t)
+        {
+            throw Throwables.propagate(t);
+        }
+
+        server = ReflectionHelper.getClass(classLoader, "net.minecraft.server.MinecraftServer");
+        try
+        {
+            ReflectionHelper.findMethod(server, null, new String[] { "main" }, String[].class).invoke(null, (Object)args);
+        }
+        catch (Exception t)
+        {
+            throw Throwables.propagate(t);
+        }
+
+    }
+
+}