sample_builder_config.xml

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<config>
  <templates>
    <update>
      <!-- Match ^[A-Za-z0-9\\-_\\.]+$ and keep it short -->
      <id>eduardo_pack</id>
      <!-- The name of the package -->
      <name>Eduardo's Contraptions</name>
      <!-- Optional URL for your news page -->
      <newsURL>http://example.com/</newsURL>
    </update>
    <package>
      <!-- Components let players turn on and off features but you don't
           have to use them, and you definitely don't need a "base game"
           component -->
      <component id="base" required="true">
        <title>Base Game</title>
        <description>These are required files to play the game.</description>
      </component>
      <component id="music" default="true">
        <title>Music</title> <!-- Example optional component -->
        <description>Random music to sooth the heart.</description>
      </component>

      <!-- Messages show HTML at specific points in the update process. They are 
           completely optional. -->
      <message id="optional-message-id" version="1">
        <phase>initialize</phase> <!-- initialize,
                                       pre-download,
                                       post-download,
                                       pre-install,
                                       post-install,
                                       finalize -->
        <agreement>true</agreement> <!-- "Do you agree?" versus information dialog -->
        <title>Question</title> <!-- Title of window -->
        <type>html</type> <!-- Use 'url' to use a URL below in <content> -->
        <content><![CDATA[
        You are <strong>really cool</strong>, yes?
        ]]></content>
      </message>
      <!-- You can have multiple messages, but don't be too annoying! You can have
           multiple messages during the same phase too (not recommended). -->
      
      <!-- This installs some important libraries for Minecraft -->
      <!-- You should probably leave these in -->
      <filegroup source="http://s3.amazonaws.com/MinecraftDownload/" dest="bin" verify="md5">
        <file size="738345">lwjgl.jar</file>
        <file size="227833">jinput.jar</file>
        <file size="138318">lwjgl_util.jar</file>
      </filegroup>
      <filegroup source="http://s3.amazonaws.com/MinecraftDownload/" dest="bin/natives" verify="md5">
        <archive size="491232" platform="windows">windows_natives.jar.lzma</archive>
        <archive size="551247" platform="linux">linux_natives.jar.lzma</archive>
        <archive size="262436" platform="mac_os_x">macosx_natives.jar.lzma</archive>
        <archive size="272470" platform="solaris">solaris_natives.jar.lzma</archive>
      </filegroup>
    </package>
  </templates>
  <files>
    <pattern archive="configs.zip">
      <!-- archive="" puts the files into a .zip so users don't have to
           download a billion files over HTTP, but you can't incrementally
           update the files inside a ZIP -->
      <include>config/*</include>
      <exclude>config/ClientConfig.cfg</exclude>
    </pattern>
    <pattern archive="default_configs.zip" overwrite="never">
      <!-- Overwrite policy can be "never" or left out -->
      <!-- Disable overwrite for "default configs" -->
      <include>config/ClientConfig.cfg</include>
    </pattern>
    <!-- This one uses the music component from above -->
    <!-- Other potential component string: "music, !sounds" to require
         the "music" component selected and the "sounds" component not
         to be selected ('sounds' is not in this example file) -->
    <pattern component="music">
      <include>music/*</include>
    </pattern>
  </files>
</config>