Put Core Mod Error Behind a Proxy.

client/ClientHelper.java

@@ -62,6 +62,7 @@ import appeng.helpers.IMouseWheelItem;
 import appeng.hooks.TickHandler;
 import appeng.hooks.TickHandler.PlayerColor;
 import appeng.server.ServerHelper;
+import appeng.transformer.MissingCoreMod;
 import appeng.util.Platform;
 import cpw.mods.fml.client.registry.ClientRegistry;
 import cpw.mods.fml.client.registry.RenderingRegistry;
@@ -394,4 +395,10 @@ public class ClientHelper extends ServerHelper
 		return Minecraft.getMinecraft().objectMouseOver;
 	}
 
+	@Override
+	public void missingCoreMod()
+	{
+		throw new MissingCoreMod();
+	}
+
 }

core/AppEng.java

@@ -22,7 +22,6 @@ import appeng.integration.IntegrationType;
 import appeng.server.AECommand;
 import appeng.services.Profiler;
 import appeng.services.VersionChecker;
-import appeng.transformer.MissingCoreMod;
 import appeng.util.Platform;
 
 import com.google.common.base.Stopwatch;
@@ -109,7 +108,9 @@ public class AppEng
 	void PreInit(FMLPreInitializationEvent event)
 	{
 		if ( !Loader.isModLoaded( "appliedenergistics2-core" ) )
-			throw new MissingCoreMod();
+		{
+			CommonHelper.proxy.missingCoreMod();
+		}
 
 		Stopwatch star = Stopwatch.createStarted();
 		configPath = event.getModConfigurationDirectory().getPath() + File.separator + "AppliedEnergistics2" + File.separator;

core/CommonHelper.java

@@ -45,4 +45,6 @@ public abstract class CommonHelper
 
 	public abstract void updateRenderMode(EntityPlayer player);
 
+	public abstract void missingCoreMod();
+
 }

server/ServerHelper.java

@@ -154,4 +154,9 @@ public class ServerHelper extends CommonHelper
 
 	}
 
+	@Override
+	public void missingCoreMod()
+	{
+		throw new RuntimeException( "Unable to Load Core Mod, please verify that AE2 is properly install in the mods folder, with a .jar extention." );
+	}
 }