diff --git a/.gitignore b/.gitignore
index 92c6fd0..d79290a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -31,3 +31,6 @@ sp-relay/out
 sp-relay/test
 sp-relay/.idea
 sp-relay/src/main/java/META-INF
+zip-generator/zip-generator.iml
+zip-generator/out
+zip-generator/src/main/java/META-INF
diff --git a/stable-download/stable-download.zip b/stable-download/stable-download.zip
index 88de0cc..eb2f22e 100644
Binary files a/stable-download/stable-download.zip and b/stable-download/stable-download.zip differ
diff --git a/stable-download/stable-download_repl.zip b/stable-download/stable-download_repl.zip
index 88de0cc..3263f00 100644
Binary files a/stable-download/stable-download_repl.zip and b/stable-download/stable-download_repl.zip differ
diff --git a/zip-generator/run.bat b/zip-generator/run.bat
new file mode 100644
index 0000000..b7e3c7d
--- /dev/null
+++ b/zip-generator/run.bat
@@ -0,0 +1,5 @@
+@echo off
+title zip-generator
+cd ..
+java -jar zip-generator/zipGenerator.jar
+pause
\ No newline at end of file
diff --git a/zip-generator/run_path.bat b/zip-generator/run_path.bat
new file mode 100644
index 0000000..09582e5
--- /dev/null
+++ b/zip-generator/run_path.bat
@@ -0,0 +1,19 @@
+@echo off
+setlocal enabledelayedexpansion
+title zip-generator
+cd ..
+echo enter the path to your java 11 installation (or leave blank to assume it is the default): 
+SET /P "JAVA11PATH="
+if "!JAVA11PATH!" neq "" (
+  set "JAVA11PATH=!JAVA11PATH:\=/!"
+  if "!JAVA11PATH:~-1!" neq "/" (
+    set "JAVA11PATH=!JAVA11PATH!/"
+  )
+  if "!JAVA11PATH:~-5!" neq "/bin/" (
+    set "JAVA11PATH=!JAVA11PATH!bin/"
+  )
+)
+echo Using java at: "!JAVA11PATH!java"
+"!JAVA11PATH!java" -jar zip-generator/zipGenerator.jar
+endlocal
+pause
\ No newline at end of file
diff --git a/zip-generator/run_unix.sh b/zip-generator/run_unix.sh
new file mode 100644
index 0000000..435b70b
--- /dev/null
+++ b/zip-generator/run_unix.sh
@@ -0,0 +1,2 @@
+#!/bin/sh
+java -jar zip-generator/zipGenerator.jar
\ No newline at end of file
diff --git a/zip-generator/src/main/java/net/lax1dude/eaglercraft/zip_generator/ZipGenerator.java b/zip-generator/src/main/java/net/lax1dude/eaglercraft/zip_generator/ZipGenerator.java
index 1804c02..fd1017b 100644
--- a/zip-generator/src/main/java/net/lax1dude/eaglercraft/zip_generator/ZipGenerator.java
+++ b/zip-generator/src/main/java/net/lax1dude/eaglercraft/zip_generator/ZipGenerator.java
@@ -96,35 +96,73 @@ public class ZipGenerator {
 		zOut.close();
 		
 		System.out.println("Writing 'stable-download/stable-download_repl.zip'");
-		
-		FileUtils.copyFile(new File("stable-download/stable-download.zip"), new File("stable-download/stable-download_repl.zip"));
+
+		ZipOutputStream zOutRepl = new ZipOutputStream(new FileOutputStream(new File("stable-download/stable-download_repl.zip")));
+		zOutRepl.setLevel(9);
+
+		zipFolder(zOutRepl, "web", new File("stable-download/web"), true);
+		zipFolder(zOutRepl, "java", new File("stable-download/java"));
+
+		zOutRepl.close();
 		
 	}
-	
+
 	private static void zipFolder(ZipOutputStream zOut, String pfx, File file) throws IOException {
-		zipFolder0(zOut, file.getAbsolutePath().replace('\\', '/'), pfx, file);
+		zipFolder(zOut, pfx, file, false);
 	}
-	
+
+	private static void zipFolder(ZipOutputStream zOut, String pfx, File file, boolean repl) throws IOException {
+		zipFolder0(zOut, file.getAbsolutePath().replace('\\', '/'), pfx, file, repl);
+	}
+
 	private static void zipFolder0(ZipOutputStream zOut, String pfx, String writePfx, File file) throws IOException {
+		zipFolder0(zOut, pfx, writePfx, file, false);
+	}
+
+	private static void zipFolder0(ZipOutputStream zOut, String pfx, String writePfx, File file, boolean repl) throws IOException {
+		byte[] replCache = new byte[0];
+		if(writePfx.length() > 0 && !writePfx.endsWith("/")) {
+			writePfx = writePfx + "/";
+		}
 		for(File f : file.listFiles()) {
 			if(f.isDirectory()) {
-				zipFolder0(zOut, pfx, writePfx, f);
+				zipFolder0(zOut, pfx, writePfx, f); // do not apply repl boolean to subdirs, as it only happens for this one top level directory in the web folder
 			}else if(f.isFile()) {
 				String path = f.getAbsolutePath().replace('\\', '/').replace(pfx, "");
 				if(path.startsWith("/")) {
 					path = path.substring(1);
 				}
-				if(writePfx.length() > 0 && !writePfx.endsWith("/")) {
-					writePfx = writePfx + "/";
+				if (repl && (f.getName().equals("classes.js") || f.getName().equals("eagswebrtc.js"))) {
+					if (replCache.length == 0) {
+						replCache = FileUtils.readFileToByteArray(f);
+					} else {
+						System.out.println("Concatenating 'eagswebrtc.js' onto 'classes.js'");
+						byte[] newFile = FileUtils.readFileToByteArray(f);
+						byte[] replCacheCache = replCache;
+						replCache = new byte[replCache.length + 2 + newFile.length];
+						System.arraycopy(replCacheCache, 0, replCache, 0, replCacheCache.length);
+						System.arraycopy(newFile, 0, replCache, replCacheCache.length + 2, newFile.length);
+						// add line breaks between them
+						replCache[replCacheCache.length] = 10;
+						replCache[replCacheCache.length + 1] = 10;
+					}
+				} else {
+					zipFile(zOut, writePfx + path, f);
 				}
-				zipFile(zOut, writePfx + path, f);
 			}
 		}
+		if (repl) {
+			zipFile(zOut, writePfx + "classes.js", replCache);
+		}
 	}
-	
+
 	private static void zipFile(ZipOutputStream zOut, String name, File file) throws IOException {
+		zipFile(zOut, name, FileUtils.readFileToByteArray(file));
+	}
+
+	private static void zipFile(ZipOutputStream zOut, String name, byte[] data) throws IOException {
 		zOut.putNextEntry(new ZipEntry(name));
-		IOUtils.write(FileUtils.readFileToByteArray(file), zOut);
+		IOUtils.write(data, zOut);
 	}
 
 }
diff --git a/zip-generator/zipGenerator.jar b/zip-generator/zipGenerator.jar
index b8bdd32..c92ae83 100644
Binary files a/zip-generator/zipGenerator.jar and b/zip-generator/zipGenerator.jar differ