title: Custom Minecraft launcher
body: <p>I want to create my own Minecraft launcher where when the player checks Force Update it downloads a modified minecraft.jar, an updated lwjgl (both not a big problem) and 2 extra folders in your .minecraft directory. I can do the first 2 by changing the MinecraftDownload directory to one on my own website and putting the modified files on my site, but i don't exactly know how to make it download and extract an archive into the .minecraft directory (i guess i will use lzma because the libs for that are already in there).</p>
  
  <p>I am new to Java, but I did some very well vb.net programming so i know standard developing terms.</p>