How to make an updater

So i have a jar file called My_Game.jar

The folders go like this:

My_Game.jar

--client

-comm

aa.class

-gui

bb.class

ImageLoader.class

--images

-imageA.png

-imageB.png

-util

cc.class

--common

-dd.class

To access these two images, I call:

Class loader = ImageLoader.class;

BufferedInputStream imgStream =new BufferedInputStream(loader.getResourceAsStream("images/"+path));

Image i = ImageIO.read(imgStream);

Now that you see how I'm loading the images, I will pose my question. On my server, I will have a file which lists all the resources for the game. Let's say that right now it lists:

imageA

imageB

imageC

The updater will see that it needs to download imageC, but how do I get the new image into the jar file?

Thanks

[938 byte] By [Nethera] at [2007-11-27 8:40:33]